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99. Adomako, B.; Adu-Ampomah, Y. (2000). Finding new female and male parents for the production of better hybrid cacao planting material for farmers in Ghana. INGENIC Newsletter 5: 15-18.

100. Adomako, B.; Adu-Ampomah, Y. (2000). Reflections on the yield of Up-per Amazon cocoa hybrids in Ghana with reference to breeding for cocoa swollen shoot virus resistant varieties. Cocoa Growers’ Bul-letin 52: 33-45.

101. Adomako, B.; Adu-Ampomah, Y. (2001). Efforts to breed for improved cocoa varieties for Ghanaian farmers. In: Proceedings, 13th Inter-national Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 199-209.

102. Adomako, B.; Adu-Ampomah, Y. (2001). The use of indices for early selection of high yielding cocoa (Theobroma cacao L.) varieties. Journal of the Ghana Science Association 3(1): 23-30.

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103. Adomako, B.; Adu-Ampomah, Y. (2003). Assessment of the yield of in-dividual cacao trees in four field trials. In: Proceedings of the Inter-national Workshop on Cocoa Breeding for Improved Production Systems, Accra, Ghana. Accra, INGENIC and Ghana Cocoa Board. 2003. pp. 41– 49.

104. Adomako, B.; Adu-Ampomah, Y. (2003). Bean characteristics of proge-nies of Upper Amazon cacao in Ghana. Tropical Agriculture 80: 41-47.

105. Adomako, B.; Adu-Ampomah, Y.; Abdul-Karimu, A. (2004). Popula-tion breeding trials. In: Final Individual Institute Reports on Cocoa Germplasm Utilization and Conservation: A Global Approach, 1998-2004, edited by A. B. Eskes. 2: 30-63.

106. Adomako, B.; Adu-Ampomah, Y.; Ollennu, L. A. A. (2006). Evaluation of resistance to cocoa swollen shoot virus (CSSV): methods, prob-lems and selections. In Final Report of the CFC/ICCO/IPGRI Project on Cocoa Germplasm Utilization and Conservation: A Global Ap-proach, 1998-2004 edited by A. B. Eskes and Y. Efron. Amsterdam, the Netherlands, CFC; London, U.K., ICCO; Rome, Italy, IPGRI. pp. 208-216.

107. Adomako, B.; Adu-Ampomah, Y.; Ollennu, L. A. A.; Obiatey H. D.; Takrama, J. F. (2005). Breeding for cocoa varieties resistant/tol-erant to cocoa swollen shoot virus. In: Final Report of Ghana/E.U. Cocoa Sector Support Programme, 2000-2004. pp. 6-24.

108. Adomako, B.; Adu-Ampomah, Y.; Owusu, G. K.; Ollennu, L. A. A. (2001). Effects of cocoa swollen-shoot virus on the yield of mature bearing trees of Upper Amazon cocoa hybrids in Ghana. Journal of the Ghana Science Association 3(2):1-6.

109. Adomako, B.; Allen, R. C.; Adu-Ampomah, Y. (1999). Combining abili-ties for yield and vegetative traits of Upper Amazon cocoa selec-tions in Ghana. Plantations Recherché Développement 6: 183-189.

110. Adomako, B.; Allen, R. C.; Adu-Ampomah, Y. (1999). Evaluation of hybrids between Upper Amazon cocoa selections in Ghana. Planta-tions Recherché Développement 6: 455-462.

111. Adomako, B.; joint author (1999). Breeding for resistance to cocoa swollen shoot virus in Ghana, by Y. Adu-Ampomah, B. Ado-mako, G. K. Owusu and L. A. A. Ollennu. In: Proceedings of the International Workshop on the Contribution of Disease Resistance to Cocoa Variety Improvement, Salvador, Bahia, Brazil, 1996. pp. 173-179.

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112. Adomako, B.; joint author (2000). Temperature-dependent resistance to crown rust infection in perennial ryegrass, Lolium perenne, by H. W. Roderick, D. Thorogood and B. Adomako. Plant Breeding 119, 91-93.

113. Adomako, B.; joint author (2002). Breeding and genetics of cocoa swollen shoot virus disease resistance in Theobroma cacao L., by Y. Adu-Ampomah, L.A.A. Ollennu, B. Adomako and B. Padi, Journal of the Ghana Science Association 4: 8-21.

114. Adomako, B. joint author (2002). The effects of Phytophthora pod rot in-fection on yield estimation in cocoa, by A. Abdul-Karimu, Y. Adu-Ampomah, B. Adomako, E. B. Frimpong and S. A. Bo-sompem. Journal of the Ghana Science Association 4: 27-32.

115. Adomako, B. joint author (2003). Investigations into the use of the crin-kle leaf mutant as a low vigour rootstock for high density planting in cocoa, by Y. Adu-Ampomah, E. B. Frimpong, B. Adomako and A. Abdul-Karimu. In: Proceedings of the International Work-shop on Cocoa Breeding for Improved Production Systems, 2003, edited by F. Bekele, M.J. End and A.B. Eskes. Accra, INGENIC and Ghana Cocoa Board. pp. 145 – 149.

116. Adomako, B. joint author (2004). Relative abundance of four species of Homoptera on 30 cocoa progenies in Ghana, by J. B. Ackonor and B. Adomako. Journal of the Ghana Science Association 6(2): 85-89.

117. Adomako, B. joint author (2004). The status of cocoa quarantine in Ghana, by G. K. Owusu and B. Adomako. In: Proceedings of IN-COPED 4th International Cocoa Pests and Diseases Seminar, Accra, Ghana, 2003. pp. 1-7.

118. Adomako, B. joint author (2005). Sources of resistance to cocoa swollen shoot virus disease, by Y. Adu-Ampomah, L. A. A. Ollennu and B. Adomako, In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 643-651.

119. Adomako, B. joint author (2006). Cocoa introductions into Ghana, by A. Abdul-Karimu, B. Adomako and Y. Adu-Ampomah. Ghana Journal of Agricultural Science 39(2): 227-238.

120. Adomako, B. joint author (2006). Cocoa population breeding approaches in Ghana. Global approaches to cocoa germplasm utilization and conservation, by Y. Adu-Ampomah, B. Adomako and I. Y. Opoku. In: Final Report of the CFC/ICCO/IPGRI Project on Cocoa Germplasm Utilization and Conservation: A Global Approach (1998-

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2004), edited by A. B. Eskes and Y. Efron. Amsterdam, CFC; Lon-don, ICCO, Rome, IPGRI. pp. 41-46.

121. Adomako, D. (1967). Properties of cocoa (Theobroma cacao L.) leaf phe-nolase. Ghana Journal of Science 7: 103-117.

122. Adomako, D. (1972). Cocoa pod husk pectin. Phytochemistry 11: 1145-1148.

123. Adomako, D. (1972). Studies on cocoa pod husk pectin. In: Proceedings, 4th International Cocoa Research Conference, St Augustine, Trin-idad and Tobago, 1972. pp. 647-650.

124. Adomako, D. (1972). Studies on mealybug (Planococcoides njalensis La-ing) nutrition: a comparative analysis for the free carbohydrate and nitrogenous compounds in cocoa bark and mealybug honey-dew. Bulletin of Entomological Research 61: 523-531.

125. Adomako, D. (1974). Chemical characterization of cocoa pectin. Chem-istry and Industry 1974: 873-874.

126. Adomako, D. (1974). Isolation of cocoa swollen shoot virus from cocoa leaves by precipitation and chromatography on Celite 545 with polyethylene glycol. Turrialba 24: 35-37.

127. Adomako, D. (1974). The suitability of a new technique for processing cocoa beans for the exploitation of cocoa by-products. In: Interna-tional Kongress Kakao Schokoladeforschung, 1974, Munchen, FRG. pp. 80-84.

128. Adomako, D. (1975). A review of researches into the commercial utiliza-tion of cocoa by-products with particular reference to the pro-spects in Ghana. CMB Newsletter 61: 12-20.

129. Adomako, D. (1975). Methyl bromide residues in fumigated cocoa beans. In: Origin and Fate of Chemical Residues in Food, Agriculture and Fisheries. Vienna, Austria, IAEA. pp. 121-129.

130. Adomako, D. (1975). Radio-tracer study of methyl bromide residues in fumigated cocoa beans. In: Proceedings of the 4th Conference of West African Cocoa Entomologists, 1974, Legon, Accra, Ghana. pp. 124-31.

131. Adomako, D. (1976). Methyl bromide residues in fumigated cocoa beans with particular reference to inorganic bromide. In: Trace Contamin-ants of Agriculture, Fisheries and Food in Developing Countries. Vi-enna, Austria, IAEA. pp. 9-14.

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132. Adomako, D. (1977). A biochemical study of the mechanism of swollen shoot virus resistance in cocoa: the role of phenolic compounds. In: Proceedings, 5th International Cocoa Research Conference, Ibadan, Nigeria, 1975. pp. 344-350.

133. Adomako, D. (1977). Fatty acid composition and characteristics of Pent-adesma butyracea fat extracted from Ghana seeds. Journal of the Science of Food and Agriculture 28: 384-386.

134. Adomako, D. (1977). Recent developments in cocoa by-products re-search in Ghana. In: Proceedings, 6th International Cocoa Re-search Conference, Caracas, Venezuela, 1977. pp. 706-718.

135. Adomako, D. (1983). Cocoa. Outlook on Agriculture 12: 83-89.

136. Adomako, D. (1985). Observations on the purification and detection of cocoa swollen shoot virus. In: Proceedings, 9th International Cocoa Research Conference, Lome, Togo. 1984. pp. 327-331.

137. Adomako, D. (1986). Pectin content of the pulp of fresh and sun-dried Robusta coffee cherry. In: Proceedings of the 11th International Scientific Colloquium on Coffee, Lome, Togo, 1985. Paris, ASIC. pp. 399-401.

138. Adomako, D. (1985). Prospects for the development of the sheanut in-dustry in Ghana. Cocoa Research Institute of Ghana. Technical Bul-letin, No.11.12p.

139. Adomako, D. (1985). Some conversion technologies for the utilisation of cocoa wastes. In: Proceedings, 9th International Cocoa Research Conference, Lome, Togo, 1984. pp. 437-441.

140. Adomako, D. (1989). Non-traditional uses of cocoa; the prospects in pro-ducing countries. Paper presented at the 6th Meeting of the Advis-ory Group on the World Cocoa Economy, The Hague, The Nether-lands 1989, organised by the International Cocoa Organization.

141. Adomako, D. (1989). Serological methods for the detection of swollen shoot virus. In: Cocoa Swollen Shoot Workshop, 25-26 July 1989, edited by M. Manu and E. K. Tetteh. pp. 24-25.

142. Adomako, D. (1990). Review of the research work at the Cocoa Research Institute of Ghana (CRIG) with particular reference to its impact on the small farmer. In: Proceedings of the1st Farming Systems Work-shop, CRIG, Tafo, Ghana. pp. 5-13.

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143. Adomako, D. (1991). Processing of cocoa wastes into by-products. Ghana Journal of Biochemistry, Biotechnology and Molecular Bio-logy 1: 88-93.

144. Adomako, D. (1992). Opportunity studies on the manufacture of by-products and some non-traditional cocoa products in Ghana. Tafo, Cocoa Research Institute of Ghana. 18p.

145. Adomako, D. (1992). Pre-feasibility studies on cocoa by-products, pre-pared for the Government of Ghana under UNIDO/NIB Project; based on the work of local consultant, Dr. Daniel Adomako. Sub-stantive officers: Dr. J.M. Sait (CTA) and Dr. B. Adu-Amankwa (NPC). 23p.

146. Adomako, D. (1996). Towards commercial production of by-products and non-conventional products from cocoa waste and beans. In: Pro-ceedings of the 2nd Malaysian International Cocoa Conference, 1994, Kuala Lumpur, Malaysia. pp. 337-350.

147. Adomako, D.; Frimpong, E. B.; Ampofo, S. T.; Brew, K. M. (1990). Observations on cocoa flushing in Ghana under different shade re-gimes, with particular reference to the distribution of natural light. Planter 66: 565-579.

148. Adomako, D.; Gyedu, E.; Takrama, J. F.; Asante, E.G. (1996). Pilot plants to process cocoa by-products in Ghana: Production cost analysis for various products. Tafo, Cocoa Research Institute. 28p.

149. Adomako, D.; Halm, B. J.; Amponsah, J. D. (1987). Summary of innov-ations/recommended technologies for cocoa and coffee produc-tion. Tafo, Cocoa Research Institute of Ghana. 16p.

150. Adomako, D.; Halm, B. J.; Amponsah, J. D. (1995). Summary of innov-ations/recommended technologies for cocoa and coffee production and current research activities. Revised edition. Tafo, Cocoa Re-search Institute of Ghana. 30p.

151. Adomako, D.; Hutcheon, W. V. (1974). Carbohydrate metabolismand translocation in healthy and cocoa swollen shoot virus-infected co-coa plants. Physiologia Plantarum 30: 90-96.

152. Adomako, D.; Lesemann, D. -E; Paul, H. L.; Owusu, G. K. (1983). Im-proved methods for the purification and detection of cocoa swollen shoot virus. Annals of Applied Biology 103: 109-116.

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153. Adomako, D.; Nair, V. R.; Kumaran, K. (1981). Effect of methods of fer-mentationon on temperature, acidity and quality of cocoa (Theo-broma cacao L.) beans. Agricultural Research Journal of Kerala 19: 55-58.

154. Adomako, D.; Nair, V. R.; Kumaran, K. (1982). Production of vinegar from cocoa sweatings. South Indian Horticulture pp.104-106.

155. Adomako, D.; Okai, D. B.; Osafo, E. L. K. (1985). Effect of different levels of cocoa pod husk on performance and carcass characteristics of finisher pigs. In: Proceedings, 9th International Cocoa Research Conference, Lome, Togo, 1984. pp. 455-459.

156. Adomako, D.; Oppong, Helena; Gyedu, Esther; Tuah, A. K.; Dodoo, R. E.; Hanson, F. K. N. (1999). Pilot-scale production of cocoa pod husk ash for the soft soap industry in Ghana. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.1021-1026.

157. Adomako, D.; Osei, S.A.; Sarpong, P. K.; Frimpong, E. B. (1995). Re-sponse of laying chickens fed to graded levels of cocoa pod husk meal. Journal of the University of Science and Technology 15: 5-8.

158. Adomako, D.; Osei-Amaning, E. (1996). Livestock feeding trials with cocoa pod husk in Ghana. Cocoa Research Institute of Ghana. Technical Bulletin. No.13, 23p.

159. Adomako, D.; Osei-Amaning, E.; Agyente-Badu, C. K.; Asante, E. G.; Gyedu, Esther; Oppong, Helena; Takrama, J. (1998). Util-ization of cocoa by-products for nutrition, body care and food sup-ply. Paper presented at the 9th Meeting of the Advisory Group on the World Cocoa Economy, 25-30 May, 1998, Valencia, Spain, or-ganised by The International Cocoa Organisation, London, U.K. 13p.

160. Adomako, D.; Osei-Amaning, E.; Agyente-Badu, C. K.; Takrama, J.; Oppong, Helena; Gyedu, Esther. (1996). Production of cocoa by-products from fresh cocoa pod wastes and non-traditional products from cocoa beans. Cocoa Research Institute of Ghana. Technical Bulletin. No.14, 34p.

161. Adomako, D.; Osei-Amaning, E.; Agyente-Badu, C. K.; Takrama J. F.; Oppong, H. (1999). Pilot plants to process cocoa by-products in Ghana: Revised production cost analysis. Tafo, Cocoa Research Institute, Ghana. 32p.

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162. Adomako, D.; Osei-Amaning, E.; Asante, E. G. (1999). Compound ani-mal feeds based on cocoa pod husk. Tropical Science 39: 120-123.

163. Adomako, D.; Owusu, G. K. (1974). Studies on the mechanical trans-mission of cocoa swollen shoot virus: some factors affecting virus multiplication and symptom development in cocoa. Ghana Journal of Agricultural Science 7: 7-15.

164. Adomako, D.; Owusu, G. K.; Oduro, K. K. (1974). Purification of cocoa necrosis virus from cocoa leaves. Phytopathology 64: 1325-1330.

165. Adomako, D.; Owusu-Manu, E. (1979). Propoxur residues in cocoa beans. In: Radiotracer Studies of Pesticide Residues in Edible Oil Seeds and Related Products. Vienna, IAEA. pp. 51-57.

166. Adomako, D.; Takrama, J. F. (1999). Large-scale collection of cocoa bean pulp juice sweatings. In: Proceedings, 12th International Co-coa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 1033-1040.

167. Adomako, D.; Tomlins, K. I.; Baker, D. M.; Daplyn, P. (1993). Effect of fer-mentation and drying practices on the chemical and physical pro-files of Ghana cocoa. Food Chemistry 46: 257-263.

168. Adomako, D.; Tuah, A.K. (1988). Digestibility of cocoa pod husk pectin polysaccharides by sheep fed rations containing cocoa pod husk. In: Proceedings, 10th International Cocoa Research Conference, Santo Domingo, Dominican Republic, 1987. pp. 853-856.

169. Adomako, D.; joint author (1973). Report of the delegation to Edgewater, New Jersey, U.S.A.: On the spot inspection of the Drevici plant for processing whole cocoa pods, December 1973, by E. J. A. Aso-maning and D. Adomako. Accra, Ministry of Industries. 11p. (Re-stricted)

170. Adomako, D.; joint author (1978). Seasonal changes in total free sugar content of field cocoa plants, by J. K. Owusu, D. Adomako and W. V. Hutcheon. Physiologia Plantarum 44: 43-47.

171. Adomako, D.; joint author (1983). Die kakao fermentation: Steuerung acidation proteolysie, by B. Biehl and D. Adomako. Lebensmittel-chemie und Gerichtliche Chemie 37: 57-63.

172. Adomako, D.; joint author (1983). The use of enzyme-linked immunosor-bent assay (ELISA) for detection of cacao swollen shoot virus (CSSV) in Theobroma cacao, by W. Sagemann, H. L. Paul, D. Ado-mako and G. K. Owusu. Phytopathologische Zeitschrift 106: 281-284.

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173. Adomako, D.; joint author (1985). Acidification, proteolysis and flavour potential in fermenting cocoa beans, by B. Biehl, E. Brunner, D. Passern, V. C. Quesnel and D. Adomako. Journal of the Science of Food and Agriculture 36: 583-598.

174. Adomako, D.; joint author (1985). Cocoa pod husk in starter diets of broiler chickens, by C. C. Atuahene, C. Adams and D. Adomako. In: Proceedings, 9th International Cocoa Research Conference, Lome, Togo. 1984. pp. 495-500.

175. Adomako, D.; joint author (1985). Detection and comparison of some Ghanaian isolates of cacao swollen shoot virus (CSSV) by enzyme-Iinked immunosorbent assay (ELISA) and immunoelectron mi-croscopy (IEM) using an antiserum to CSSV strain 1A, by W. Sage-mann, D.-E. Lessemann, H. L. Paul, D. Adomako and G. K. Owusu. Phytopathologische Zeitschrift 114: 79-89.

176. Adomako, D.; joint author (1985). Evaluation of cocoa pod husk as feed ingredient for sheep in Ghana, by A. K. Tuah, S. Dzoagbe and Ado-mako, D. In: Proceedings, 9th International Cocoa Research Con-ference, Lome, Togo. 1984. pp. 505-510.

177. Adomako, D.; joint author (1986). Blood chemistry, haematology, rumen microorganism populations and carcass and offal yields of sheep fed diets containing varying levels of cocoa pod husk, by A. K. Tuah, D. Adomako, K. M. Brew and S. Dzoagbe. Bulletin of Ani-mal Health and Production in Africa 34: 191-196.

178. Adomako, D.; joint author (1987). Forty-eight years of cocoa research at the Cocoa Research Institute of Ghana, by V. A. Martinson, D. Adomako and M. Manu. Cocoa Growers’ Bulletin 38: 39-55.

179. Adomako, D.; joint author (1989). The productivity of cattle raised under sheanut trees in the Bole District of the northern region-A prelimi-nary report, by A. K. Tuah, E. Osei-Amaning, D. Adomako and E. B. Frimpong. In: Proceedings of the 19th Animal Science Sym-posium, Kumasi, Ghana. pp.121-124.

180. Adomako, D.; joint author (1990). The performance of West African shorthorn breed of cattle grazing under sheanut trees in the Bole district in the Guinea Savannah zone of Ghana. Paper presented at the 1st African Small Ruminants Research Networks Conference, 1990, Nairobi, Kenya, by E. Osei-Amaning, A. K. Tuah, D. Ado-mako and E. B. Frimpong. pp. 35-39.

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181. Adomako, D.; joint author (1991). Chemical composition of cocoa pod husk and its effect on growth and food efficiency in broiler chicks, by A. Donkoh, C. C. Atuahene, B. N. Wilson and D. Adomako. Ani-mal Feed Science and Technology 35: 161-169.

182. Adomako, D.; joint author (1991). Cocoa pod-and-husk meal as a feed in-gredient in layer diets, by S. A. Osei, C. C. Atuahene, D. Heathcote, E. B. Frimpong and D. Adomako. Animal Feed Science and Technology 35: 283-288.

183. Adomako, D.; joint author (1991). The sugar content of cocoa sweatings and the effect of pressing the sweatings prior to fermentation on bean quality, by A. O. Dwapanyin, D. Adomako and J. P. Tetteh. Ghana Journal of Biochemistry, Biotechnology and Molecular Biol-ogy 1: 109-120.

184. Adomako, D.; joint author (1993). Studies on particle components of ca-cao swollen shoot virus, by C. Uhde, H. J. Vetten, E. Maiss, D. Ado-mako and H. L. Paul. Journal of Phytopathology 139: 207-216.

185. Adomako, D.; joint author (1994). The performance of growing Djallonke lambs fed feed containing different levels of cocoa pod husk, 10% NaOH-treated corn cobs and sundried caged layer manure, by E. Osei-Amaning, A. K.Tuah, E. K. Abu, E. B. Frimpong and D. Adomako. In: Proceedings, 11th International Cocoa Research Conference, Yamoussoukro, Republique de Côte d’Ivoire. 1993. pp. 791-796.

186. Adomako, D.; joint author (1995). Evidence from the virobacterial agglu-tination test for the existence of eight serogroups of cocoa swollen shoot virus, by J. d’A. Hughes, D. Adomako and L. A. A. Ol-lennu. Annals of Applied Biology 127: 297-307.

187. Adomako, D.; joint author (1995). Polymerase chain reaction and im-munocapture polymerase chain reaction (ICPCR) for the detection and identification of cocoa swollen shoot virus isolates, by S. T. Sackey, S. T. Lowor, H. Dzahini-Obiatey, G. K. Owusu, D. Adomako, K. Hoffmann, H. J. Vetten and E. Maiss. Ghana Journal of Biochemistry, Biotechnology and Molecular Biology 3: 57-66.

188. Adomako, D.; joint author (1997). Immunocapture polymerase chain re-action for the detection and identification of cocoa swollen shoot virus 1A isolates, by K. Hoffmann, S. T. Sackey, H. J. Vetten, E. Maiss and D. Adomako. Journal of Phytopathology 145: 205-212.

189. Adomako, D.; joint author (1997). Polymerase chain reaction and nucleic acid hybridization methods for the detection and differentiation of

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cocoa swollen shoot virus isolates, by S. T. Sackey, S. T. Lowor, H. Dzahini-Obiatey, G. K. Owusu, D. Adomako, K. Hoffmann, H. J. Vetten, and E. Maiss. In: Proceedings of the1st International Cocoa Pests and Diseases Seminar, Accra, Ghana, 1995. pp. 191-200.

190. Adomako, D.; joint author (1999). Effect of diets containing varying lev-els of cocoa pod husk (CPH) and NaOH-treated corn cob on the re-productive performance of confined Djallonke sheep, by A. K. Tuah, F. Y. Obese, D. B. Osei, D. B. Okai, Adomako, D.; E . Boye-Frimpong and K. O. Amaning. In: Proceedings, 12th Interna-tional Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 1047-1052.

191. Adomako, D.; joint author (1999). Production, characterization and appli-cation of monoclonal antibodies to cacao swollen shoot virus iso-late 1A, by K. Hoffmann, C. Uhde, D.-E. Lesemann, S. T. Sackey, D. Adomako and H. J. Vetten. Journal of Phytopathology 147: 725-735

192. Adomako, D.; joint author (1999). Variation in cocoa swollen shoot virus isolates, by S. T. Sackey, H. Dzahini-Obiatey, G. K. Owusu and D. Adomako. In: Proceedings, 12th International Cocoa Re-search Conference, Salvador, Bahia, Brazil, 1996. pp. 193-199.

193. Adomako, D.; joint author (2003). Relative drought tolerance in cocoa (Theobroma cacao L) accessions, by E. B. Frimpong, Y. Adu-Am-pomah, D. Adomako, A. O. Dwapanyin and A. Abdul-Karimu. Journal of the Ghana Science Association 5(2): 100–108.

194. Adri, A. K.; joint author (1974). The end of the first cocoa shade and ma-nurial experiment at the Cocoa Research Institute of Ghana, by Y. Ahenkorah, G. S. Akrofi and A. K. Adri. Journal of Horticultural Science 49: 43-51.

195. Adu-Acheampong, R.; Ackonor, J. B. (2005). Seasonal occurrence, spatial distribution and control of the cocoa stem borerEulophono-tus myrmeleon in Ghana. Tropical Science 45: 129-132.

196. Adu-Acheampong, R.; Ackonor, J. B. (2005). The effect of imidacloprid and mixed pirimiphos-methyl and bifenthrin on non-target cocoa arthropods. Tropical Science 45: 157-158.

197. Adu-Acheampong, R.; Padi, B. (2005). Temporal and spatial distribu-tion of the cocoa stem borer, Eulophonotus myrmeleon Fldr. (Lepi-

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doptera: Cossidae). In: Proceedings, 14th International Cocoa Re-search Conference, Accra, Ghana, 2003. pp. 573-578.

198. Adu-Acheampong, R.; Padi, B.; Sarfo, J. E. (2004). Sexual attraction in the cocoa stem borer, Eulophonotus myrmeleon Fldr. (Lepidoptera: Cossidae) In: Proceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, Accra, Ghana, 2003. pp. 136-138.

199. Adu-Acheampong, R.; Padi, B.; Sarfo, J. E. (2004). The life cycle of the cocoa stem borer in Ghana. Tropical Science 44: 28-30.

200. Adu-Acheampong, R.; joint author (2001). An integrated pest manage-ment strategy for the control of the coffee stem borer, Bixadus Sierricola White (Coleoptera: Lamiidae), by B. Padi and R. Adu-Acheampong. In: Proceedings of the 19th International Scientific Colloquium on Coffee, Trieste, Italy, 14-18th May 2001. [5p.] (On compact disc).

201. Adu-Acheampong, R.; joint author (2001). Botanical pesticides for the control of cocoa capsids (Heteroptera: Miridae), by B. Padi, R. Adu-Acheampong and A. Nkansah. Proceedings, 13th Interna-tional Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 403-4111.

202. Adu-Acheampong, R.; joint author (2001). Preliminary measures for the control of the cocoa stem borer Eulophonotus myrmeleon Fldr. (Lepidoptera: Cossidae), by B. Padi and R. Adu-Acheampong. Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 649-654.

203. Adu-Acheampong, R.; joint author (2001). Recent advances in the de-velopment of integrated pest management strategy for the control of cocoa mirids and mealybug vectors of CSSV disease in Ghana, by B. Padi, J. B. Ackonor, I. Y. Opoku, D. Hall, D. Farman, M. Downham, G. Oduor, S. Lowor, E. Owusu-Manu, Y. Adu-Am-pomah, J. E. Sarfo, R. Adu-Acheampong, I. Reich and E. Adu-sei. In: Proceedings of INCOPED 3rd International Cocoa Pests and Diseases Seminar, 2000, Kota Kinabalu, Sabah, Malaysia. pp. 114-122.

204. Adu-Acheampong, R.; joint author (2003). Screening of neem extracts for the control of cocoa capsids (Heteroptera: Miridae), by B. Padi, R. Adu-Acheampong, M. Asamoah, F. Aneani, F. Baah and M. K. Tamakloe. In: Proceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, 2003, Accra, Ghana. pp. 44-52.

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205. Adu-Acheampong, R.; joint author (2005). On-farm trials on thaimethoxam (Actara 240 SC) and fenobucard (Bassa 500 EC) for the control of cocoa capsids (Heteroptera: Miridae) in Ghana, by B. Padi, R. Adu-Acheampong and M. Asamoah. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 827-834.

206. Adu-Acheampong, R.; joint author (2005). An outline of the procedure for testing and recommending insecticides at CRIG. Paper pre-sented at the1st Cocobod Conference for the Promotion local con-sumption of cocoa products and 24th biennial Conference of the Ghana Science Association. 2005, GIMPA, Accra, Ghana, by J. B. Ackonor and R. Adu-Acheampong.

207. Adu-Acheampong, R.; joint author (2008). Sustainable cocoa production in Ghana, conventional or organic? by A. R Cudjoe, J. B. Ackonor, S. Adimado, R. Adu-Acheampong, J. E. Sarfo and A. A. Afrifa. Journal of the Ghana Science Association (In Press)

208. Adu-Ampomah, Y. (1993). Mutation breeding through in vitro culture techniques for resistance to cocoa swollen shoot virus disease. In: Induced Mutations and In Vitro Culture Techniques for Improving Crop Plant Resistance to Disease. Proceedings of the Final Re-search Co-ordination Meeting organized by the Joint FAO/IAEA Divi-sion of Nuclear Techniques in Food and Agriculture, 7-11 October, 1991, Greenbach, Germany. pp. 9-15.

209. Adu-Ampomah, Y. (1996). The cocoa breeding programme in Ghana: achievements and prospects for the future. Cocoa Growers’ Bul-letin 50: 17-21.

210. Adu-Ampomah, Y. (1996). The cocoa mutation breeding programme at the Cocoa Research Institute of Ghana. In: Proceedings of the Re-gional Workshop on Implementation of On-station and On-farm Evaluation of Improved Mutant Lines of Important African Crops, 1996, Bamako, Mali. pp.21-27.

211. Adu-Ampomah, Y. (1997). Sheanut germplasm collection in Ghana. In: Proceedings of the 1st Ghana National Biodiversity and Plant Ge-netic Resources Workshop, 1994, Koforidua, Ghana. pp. 44-47.

212. Adu-Ampomah, Y.; Abdul-Karimu, A.; Frimpong, E. B. (1996). The cocoa breeding programme at the Cocoa Research Institute of Ghana (CRIG), Tafo. In: Proceedings of the International Workshop

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on the Utilization of the Genetic Resources of the International Co-coa Genebank, 1996, St. Augustine, Trinidad and Tobago. pp.31-42

213. Adu-Ampomah, Y.; Abdul-Karimu, A.; Frimpong, E. B. (1999). The utilization of germplasm for the genetic improvement of cocoa in Ghana. Journal of the Ghana Science Association [Special edition] 2(1): 99-102.

214. Adu-Ampomah, Y.; Adomako, B.; Opoku, I. Y. (2006). Cocoa popula-tion breeding approaches in Ghana. In: Final Report of the CFC/ICCO/IPGRI Project on Cocoa Germplasm Utilization and Conserva-tion: A Global Approach (1998-2004), edited by A. B. Eskes and Y. Efron. Amsterdam, CFC; London, ICCO, Rome, IPGRI. pp. 41-46.

215. Adu-Ampomah, Y.; Adomako, B.; Owusu, G. K.; Ollennu, L. A. A. (1999). Breeding for resistance to cocoa swollen shoot virus in Ghana. In: Proceedings of the International Workshop on the Con-tribution of Disease Resistance to Cocoa Variety Improvement, Sal-vador, Bahia, Brazil, 1996. pp.173-179.

216. Adu-Ampomah, Y.; Amponsah, J. D.; Abdul-Karimu, A. (1997). As-pects of cocoa germplasm conservation in Ghana. In: Proceedings of the 1st Ghana National Biodiversity and Plant Genetic Resources Workshop, 1994, Koforidua, Ghana. pp.115-120.

217. Adu-Ampomah, Y.; Amponsah, J. D.; Abdul-Karimu, A. (1997). Breeding for resistance to blackpod disease of cocoa caused by Py-htophthora palmivora in Ghana. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp.127-131.

218. Adu-Ampomah, Y.; Amponsah, J. D.; Abdul-Karimu, A.; Sersah, J. A. (1995). Cocoa germplasm conservation in Ghana. Plant Genetic Resources Newsletter 103: 14-18.

219. Adu-Ampomah, Y.; Frimpong, E. B.; Adomako, B.; Abdul-Karimu, A. (2003). Investigations into the use of the crinkle leaf mutant as a low vigour rootstock for high density planting in cocoa. In: Pro-ceedings of the International Workshop on Cocoa Breeding for Im-proved Production Systems, 2003, edited by F. Bekele, M. J. End and A. B. Eskes. Accra, INGENIC and Ghana Cocoa Board. pp. 145 – 149.

220. Adu-Ampomah, Y.; Furtek, D. (1995). Efforts to identify RAPD markers linked to cocoa swollen shoot virus disease resistance genes in some gamma-induced resistant mutants of cocoa. In: FAO/IAEA In-

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ternational Symposium on the Use of Induced Mutations and Molecular Techniques for Crop Improvement, 1995, Vienna, Aus-tria. Book of Abstracts. pp. 107-108.

221. Adu-Ampomah, Y; Klu, G. Y. P.; Lamptey, T. V. O.; Novak, F. (1987). Pre-liminary survey into ways of overcoming self-incompatibility in Theobroma cacao L. In: Proceedings of the Joint 13th Biennial Con-ference of West African Science Association and the 15th Biennial Conference of the Ghana Science Association,1987, University of Ghana, Legon. pp. 172-178.

222. Adu-Ampomah, Y.; Martinson, V. A.; Dasi, Esther; Amonoo, R. S. (1993). Breeding efforts to improve coffee production in Ghana. In: Proceedings of the 15th International Scientific Colloquium on Cof-fee, 1993, Montpellier, France. Paris, ASIC. pp. 253-261.

223. Adu-Ampomah, Y.; Novak, F. J.; Afza, R.; Van Durren, M. (1988). Deter-mination of methodology to obtain shoot tip culture of cocoa. In: Proceedings, 10th International Cocoa Research Conference, Santo Domingo, Dominican Republic. 1987. pp. 137-142.

224. Adu-Ampomah, Y.; Novak, F. J.; Afza, R.; Van Durren, M. (1988). Embroid and plant production from cultured cocoa explants. In: Proceed-ings, 10th International Cocoa Research Conference, Santo Domingo, Dominican Republic. 1987. pp.129-136.

225. Adu-Ampomah, Y.; Novak, F. J.; Afza, R.; Van Duren, M. (1992). Meris-tem-tip culture of cocoa (Theobroma cacao L.). Tropical Agriculture 69: 268-272.

226. Adu-Ampomah, Y.; Novak, F. J.; Afza, R.; Van Durren, M.; Perea-Dallos, M. (1988). Initiation and growth of somatic embryos of cocoa (Theobroma cacao L.). Café, Cacao, Thé, 32: 187-200.

227. Adu-Ampomah, Y.; Novak, F. J.; Klu, G. Y. P. (1991). Genetic improve-ment of cocoa for resistance to swollen shoot disease through mu-tation breeding and in vitro culture techniques. In: Proceedings of the International Symposium on Contribution of Plant Mutation Breeding to Crop Improvement, jointly organised by I.A.E.A. and F.A.O., 1990, Vienna, Austria. pp. 139-147.

228. Adu-Ampomah, Y.; Novak. F. J.; Klu. G. Y. P.; Lamptey, T.V.O. (1991). Use of irradiated pollen as mentor pollen to induce self-fertilisation of two self-incompatible Upper Amazon cacao clones. Euphytica 51: 219-225.

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229. Adu-Ampomah, Y.; Ollennu, L. A. A.; Adomako, B. (2005). Sources of resistance to cocoa swollen shoot virus disease. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 643-651.

230. Adu-Ampomah, Y.; Ollennu, L. A. A.; Adomako, B.; Padi, B. (2002). Breeding and genetics of cocoa swollen shoot virus disease resis-tance in Theobroma cacao L. Journal of the Ghana Science Associa-tion 4(2): 8-21.

231. Adu-Ampomah, Y.; Owusu, G. K. (1994). Induction of cocoa swollen shoot disease-resistant mutants by gamma irradiation. In: Pro-ceedings, 11th International Cocoa Research Conference, Yamous-soukro, Republique de Côte d’Ivoire, 1993. pp. 585-589.

232. Adu-Ampomah, Y.; Owusu, G. K.; Sackey, S. T.; Padi, B.; Abdul-Karimu, A. (1996). Use of gamma rays to induce mutants resis-tant to cocoa swollen shoot disease in Theobroma cacao L. Plant Breeding 115: 74-76.

233. Adu-Ampomah, Y. joint author (1995). Physiology of drought tolerance in cocoa (Theobroma cacao L.) 1. Root factor in tolerance to drought, by E. B. Frimpong, Y. Adu-Ampomah and J. E. Sarfo. In: Proceedings of the Conference on Dynamics of Physiological Processes in Woody Roots, 8-11 October, 1995, Ithaca, New York, USA. pp. 9-11.

234. Adu-Ampomah, Y.; joint author (1996). Applications of biotechnology for cocoa tree improvement, by D. Furtek, Y. Adu-Ampomah, B. An-debrhan, G. Glazier, S. Chunyan, A. Lopez, J. Osei, V. Patel, S. Sain, H. Simka, T. N. Sreenivasan and A. Traore. In: Proceedings of the 2nd Malaysian International Cocoa Research Conference, 1994, Kuala Lumpur, Malaysia. pp.182-193.

235. Adu-Ampomah, Y.; joint author (1996). The blackpod resistance breed-ing programme in Ghana, by A. Abdul-Karimu, Y, Adu-Ampo-mah, J. D. Amponsah and I. Y. Opoku. In: Proceedings of IN-GENIC Workshop on the Contribution of Disease Resistance to Co-coa Variety Improvement, 1996, Salvador, Bahia, Brazil. pp. 149-158.

236. Adu-Ampomah, Y.; joint author (1997). Improvement in the perfor-mance of Robusta coffee in Ghana, by E. Anim-Kwapong and Y. Adu-Ampomah. In: Proceedings of the 17th International Scientific Colloquium on Coffee, 1997, Nairobi, Kenya. Paris, ASIC. pp. 514-519.

237. Adu-Ampomah, Y. joint author (1998). Optimising growth in relation to light regime and development of improved Robusta coffee, by E.

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B. Frimpong, Y. Adu-Ampomah, J. E. Sarfo, and S. Akuoko. Journal of the Ghana Science Association 1(2): 12-16.

238. Adu-Ampomah, Y. joint author (1999). Combining abilities for yield and vegetative traits of Upper Amazon cocoa selections in Ghana, by B. Adomako, R. C. Allen and Y. Adu-Ampomah. Plantations Re-cherche Développement 6: 183-189.

239. Adu-Ampomah, Y. joint author (1999). Efforts to breed for drought resis-tant cocoa in Ghana, by E. B. Frimpong, Y. Adu-Ampomah and A. Abdul-Karimu. In: Proceedings, 12th International Cocoa Re-search Conference, Salvador, Bahia, Brazil, 1996. pp. 375-381.

240. Adu-Ampomah, Y. joint author (1999). Evaluation of hybrids between Upper Amazon cocoa selections in Ghana, by B. Adomako, R. C. Allen, and Y. Adu- Ampomah. Plantations Recherche Développe-ment 6: 455-462.

241. Adu-Ampomah, Y. joint author (2000). Finding new female and male parents for the production of better hybrid cacao planting material for farmers in Ghana, by B. Adomako and Y. Adu-Ampomah. IN-GENIC Newsletter 5: 15-18.

242. Adu-Ampomah, Y.; joint author (2000). Prospects of using cassava as a temporary shade for cocoa in the degraded areas, by E. B. Frim-pong, A. O. Dwapanyin, Y. Adu-Ampomah and A. Abdul-Karimu. Journal of the Ghana Science Association 2: 158-163.

243. Adu-Ampomah, Y. joint author (2000). Reflections on the yield of Upper Amazon cocoa hybrids in Ghana with reference to breeding for co-coa swollen shoot virus resistant varieties, by B. Adomako and Y. Adu-Ampomah. Cocoa Growers’ Bulletin 52: 33-45.

244. Adu-Ampomah, Y. joint author (2001). Effects of cocoa swollen-shoot virus on the yield of mature bearing trees of Upper Amazon cocoa hybrids in Ghana, by B. Adomako, Y. Adu-Ampomah, G. K. Owusu and L. A. A. Ollennu. Journal of the Ghana Science Asso-ciation 3(2): 1-6.

245. Adu-Ampomah, Y. joint author (2001). Efforts to breed for improved co-coa varieties for Ghanaian farmers, by B. Adomako and Y. Adu-Ampomah. In: Proceedings, 13th International Cocoa Research Conference, 2000, Kota Kinabalu, Sabah, Malaysia. pp. 199-209.

246. Adu-Ampomah, Y.; joint author (2001). Recent advances in the develop-ment of integrated pest management strategy for the control of cocoa mirids and mealybug vectors of CSSV disease in Ghana, by

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B. Padi, J. B. Ackonor, I. Y. Opoku, D. Hall, D. Farman, M. Downham, G. Oduor, S. Lowor, E. Owusu-Manu, Y. Adu-Am-pomah, J. E. Sarfo, R. Adu-Acheampong, I. Reich and E. Adu-sei. In: Proceedings of INCOPED 3rd International Cocoa Pests and Diseases Seminar, 16-17 October 2000, Kota Kinabalu, Sabah, Malaysia. pp. 114-122.

247. Adu-Ampomah, Y. joint author (2001). Robusta coffee improvement in Ghana -achievements and prospects, by Esther Anim-Kwapong and Y. Adu-Ampomah. In: Proceedings of the 19th International Scientific Colloquium on Coffee, Trieste, Italy, 2001. [8p.] (On com-pact disc).

248. Adu-Ampomah, Y. joint author (2001). The use of indices for early selec-tion of high yielding cocoa (Theobroma cacao L.) varieties, by B. Adomako and Y. Adu-Ampomah. Journal of the Ghana Science Association 3(1): 23-30.

249. Adu-Ampomah, Y. joint author (2002). The effects of Phytophthora pod rot infection on yield estimation in cocoa, by A. Abdul-Karimu, Y. Adu-Ampomah, B. Adomako, E. B. Frimpong and S. A. Bosom-pem. Journal of the Ghana Science Association 4: 27-32.

250. Adu-Ampomah, Y. joint author (2003). Assessment of the yield of indi-vidual cacao trees in four field trials, by B. Adomako and Y. Adu-Ampomah. In: Proceedings of the International Workshop on Co-coa Breeding for Improved Production Systems, 2003, Accra, Ghana. pp. 41-49.

251. Adu-Ampomah, Y. joint author (2003). Bean characteristics of progenies of Upper Amazon cacao in Ghana, by B. Adomako and Y. Adu-Ampomah. Tropical Agriculture 80(1): 41-47.

252. Adu-Ampomah, Y. joint author (2003). Kola germplasm collection and conservation at the Cocoa Research Institute of Ghana, by A. Ab-dul-Karimu, K. Osei-Bonsu, Y. Adu-Ampomah, F. M. Amoah, G. J. Anim-Kwapong, J. F. Takrama, J. E. Sarfo and K. Acheampong. Journal of the Ghana Science Association 6(1): 139-146.

253. Adu-Ampomah, Y. joint author (2003). Relative drought tolerance in co-coa (Theobroma cacao L) accessions, by E. B. Frimpong, Y. Adu-Ampomah, D. Adomako, A. O. Dwapanyin and A. Abdul-Karimu. Journal of the Ghana Science Association 5(2): 100-108.

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254. Adu-Ampomah, Y. joint author (2003). Using 32 P soil injection technique in the root activity studies of Gliricidia sepium, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, M. R. Appiah and K. Ofori- Frimpong. Journal of the Ghana Science Association 5(1): 45–52.

255. Adu-Ampomah, Y. joint author (2004). Agronomic characteristics of drought tolerant Robusta coffee genotypes, by Esther Anim-Kwapong and Y. Adu-Ampomah. In: Proceedings of the 20th In-ternational Scientific Colloquium on Coffee, Bangalore, India, 2004. Paris, ASIC. pp.1081-1084

256. Adu-Ampomah, Y. joint author (2004). Population breeding trials, by B. Adomako, Y. Adu-Ampomah and A. Abdul-Karimu. In: Final In-dividual Institute Reports on Cocoa Germplasm Utilization and Con-servation: A Global Approach, 2003, edited by A. B. Eskes. 2: 30-63.

257. Adu-Ampomah, Y. joint author (2005). Breeding for cocoa varieties re-sistant/tolerant to cocoa swollen shoot virus, by B. Adomako, Y. Adu-Ampomah, L. A. A. Ollennu, H. Dzahini-Obiatey and J. F. Takrama. Final Report of Ghana/E.U. Cocoa Sector Support Pro-gramme (April, 2000 – December, 2004). pp. 6 – 24.

258. Adu-Ampomah, Y. joint author (2005). Efforts to re-establish cocoa in denuded areas in Ghana, by E. B. Frimpong, Y. Adu-Ampomah, A. O. Dwapanyin and A. Abdul-Karimu. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 317-324.

259. Adu-Ampomah, Y. joint author (2005). Selection of cocoa genotypes as parents for resistance to Phytophthora megakarya and Phytoph-thora palmivora, by I. Y. Opoku, A. Y. Akrofi, A. Abdul-Karimu and Y. Adu-Ampomah. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 817-825.

260. Adu-Ampomah, Y. joint author (2005). Use of 32 P and 15N to determine the efficiency of utilization of phosphorus and nitrogen fertilizers in cocoa seedlings, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Am-pomah, M. R. Appiah and K. Ofori-Frimpong. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 231- 237.

261. Adu-Ampomah, Y. joint author (2006). Cocoa introductions into Ghana, by A. Abdul-Karimu, B. Adomako and Y. Adu-Ampomah. Ghana Journal of Agricultural Science 39(2): 227-238.

262. Adu-Ampomah, Y. joint author (2006). Evaluation of resistance to cocoa swollen shoot virus (CSSV): methods, problems and selections, by B. Adomako, Y. Adu-Ampomah and L. A. A. Ollennu. In: Final

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Report of the CFC/ ICCO/ IPGRI Project on Cocoa Germplasm Uti-lization and Conservation: A Global Approach 1998-2004, edited by A. B. Eskes and Y. Efron. Amsterdam, CFC; London, ICCO; Rome, IPGRI. pp. 208-216.

263. Adu-Ampomah, Y. joint author (2006. Impact of breeders’ collection on cocoa plantings of Ghana: Assessment by molecular marker analy-sis and farmers’ field survey, by S. Y. Opoku, R. Bhattacharjee, M. Kolesnikova-Allen, L. Enu-Kwesi, E. G. Asante and Y. Adu-Am-pomah. Journal of the Ghana Science Association 8:1–2.

264. Adu-Ampomah, Y. joint author (2007). Farmers’ fields: Potential source of blackpod resistant materials, by I. Y. Opoku, A. Y. Akrofi, Y. Adu-Ampomah and M. K. Assuah. In: Proceedings, 15th Interna-tional Cocoa Research Conference, San Jose, Costa Rica. 2006. pp. 1015-1022.

265. Adu-Ampomah, Y. joint author (2007). Genetic diversity in cocoa (Theo-broma cacao, L.) germplasm collection from Ghana, by S. Y. Opoku, R. Bhattacharjee, M. Kolesnikova-Allen, J.C. Motamayor, R. Schnell, I. Ingelbrecht, L. Enu-Kwesi, Y. Adu-Ampomah. Journal of Crop Improvement 20: 73 – 87.

266. Adu-Ampomah, Y. joint author (2007). Heritability of single plant yield and incidence of blackpod disease in cocoa, by G. Lockwood, F. Owusu-Ansah and Y. Adu-Ampomah. Experimental Agriculture 43: 455-462.

267. Adu-Ampomah, Y. joint author (2007). Responses of different cocoa va-rieties to different phosphorus sources, by A. A. Afrifa, A. R. Za-harah, Y. Adu-Ampomah, K. Ofori-Frimpong and M. R. Ap-piah, In: Proceedings, 15th International Cocoa Research Confer-ence, San Jose, Costa Rica. 2006. pp. 731-733.

268. Adu-Ampomah, Y. joint author (In press). Profile of cocoa planting mate-rials in Ghana cocoa farms, by S. Y. Opoku, M. Kolesnikova-Allen, E. G. Asante and Y. Adu-Ampomah. INGENIC Newsletter

269. Adu-Ampomah, Y. joint author (In press). Verification of identity of breeding material in South East Asia and West Africa, by N. C. Cryer, M. Kolesnikova-Allen, D. Zhang, B. Athanson, S. Y. Opoku, P. Aikpokpodion, B. M. Efombagn, Y. Adu-Ampomah, S. Nelson, M. Gilmour, P. Hadley, M. J. Wilkinson, and G. Lockwood. In: Pro-ceedings of the Malaysian International Cocoa Research Confer-ence, Kuala Lumpur, Malaysia, 18-19 July 2005.

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270. Afrifa, A. A.; (1993). The effects of pesticides on plant litter decomposi-tion in soils. M. Agr. Sc. Dissertation, University of Reading, Read-ing, U.K. 74p.

271. Afrifa, A. A.; Ofori-Frimpong, K.; Abekoe, M. K. (2007). Boron levels in soils cropped to coffee and their relationships to some soil proper-ties in Ghana. West African Journal of Applied Ecology 11: 189-196.

272. Afrifa, A. A.; Ofori-Frimpong, K.; Appiah, M. R.; Acquaye, S.; Snoeck, D. (2007). Nitrogen, phosphorus and potassium budget under the cocoa ecosystem: produce harvesting phase. In: Pro-ceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica. 2006. pp. 395-404.

273. Afrifa, A. A.; Ofori-Frimpong, K.; Appiah, M. R.; Halm, B.J. (2003). Effects of mulching on soil nutrients and yield of Robusta coffee. Tropical Agriculture 80: 105-109.

274. Afrifa, A. A.; Zaharah, A. R.; Adu-Ampomah, Y.; Appiah, M.R.; Ofori-Frimpong, K. (2003). Using 32 P soil injection technique in the root activity studies of Gliricidia sepium. Journal of the Ghana Science Association 5(1): 45–52

275. Afrifa, A. A.; Zaharah, A. R.; Adu-Ampomah, Y.; Appiah, M. R.; Ofori-Frimpong, K. (2005). Use of 32 P and 15N to determine the effi-ciency of utilization of phosphorus and nitrogen fertilizers in cocoa seedlings. In: Proceedings, 14th International Cocoa Research Con-ference, Accra, Ghana, 2003. pp. 231- 237.

276. Afrifa, A. A.; Zaharah, A. R.; Adu-Ampomah, Y.; Ofori-Frimpong, K.; Appiah, M. R. (2007). Responses of different cocoa varieties to different phosphorus sources. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica. 2006. pp. 731-733.

277. Afrifa, A. A.; joint author (1987). The germination of colanut (Cola nitida (Ventenant) Schott and Endlicher), by K. Osei-Bonsu and M. K. Afrifa. Ghana Journal of Agricultural Science 2: 20-33.

278. Afrifa, A. A.; joint author (1997). The consequences of cocoa production on soil fertility in Ghana: a review, by M. R. Appiah, S. T. Sackey, K. Ofori-Frimpong, and A. A. Afrifa. Ghana Journal of Agricultural Science 30: 183-190.

279. Afrifa, A. A.; joint author (1999). Prospects of fertilizer use in the cocoa industry in Ghana, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa and E.G. Asante. In: Efficient soil and water management: A prerequisite for sustainable agriculture. Proceedings of the 14th

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and 15th Annual General Meetings of the Soil Science, Accra, Ghana 1997. pp. 215-221.

280. Afrifa, A. A.; joint author (1999). The response of cocoa yield to fertilizer application under different farm maintenance practices, by K. Opoku-Ameyaw, M. R. Appiah, K. Ofori-Frimpong and A. A. Afrifa. In: Managing Soils for Sustainable Production of Food and Industrial Crops: Proceedings of the16th Annual General Meeting of the Soil Science Society of Ghana. pp. 105-112.

281. Afrifa, A. A.; joint author (2000). Sustainable cocoa production in Ghana through soil fertility management, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa, E. G. Asante, K. Opoku-Ameyaw and J. B. Danquah. : Margaret Opferkuch Award for Best Innovation in the Cocoa Industry in Ghana for the year 2000. 27p.

282. Afrifa, A. A.; joint author (2001). Constraints of cocoa farming: socio-eco-nomic perspectives, by K. Osei-Bonsu, F. Baah and A. A. Afrifa. In: Proceedings of the Farmer Field School Curriculum Develop-ment Workshop, CRIG, Tafo. pp. 59-66.

283. Afrifa, A. A.; joint author (2001). Evaluation of cocoa conditions, prob-lems and possible solutions in four farming communities surround-ing the Kakum Forest Reserve, Central Region, Ghana: A consult-ing report to Conservation International, Ghana, by K. Osei-Bonsu, F. Baah and A. A. Afrifa. 25p.

284. Afrifa, A. A.; joint author (2001). Screening of some leguminous plants for soil fertility improvement and weed management during cocoa establishment, by K. Ofori-Frimpong, F. K. Oppong, M. R. Ap-piah and A. A. Afrifa. In: Proceedings, 13th International Cocoa Research Conference, 2000. Kota Kinabalu, Malaysia. pp. 1277-1286.

285. Afrifa, A. A.; joint author (2002). Alleviating rural poverty through fertilty management of cocoa soils in Ghana – A case study, by K. Ofori-Frimpong, M. R. Appiah and A. A. Afrifa. In: Managing Soils for Sustainable Production of Food and Industrial Crops: Proceedings of the 16th Annual General Meeting of the Soil Science Society of Ghana, 1999. pp. 133-137.

286. Afrifa, A. A.; joint author (2002). Growth and nutrient uptake of some co-coa varieties grown in contrasting soils, by K. Ofori-Frimpong, A. A. Afrifa and M.R. Appiah. Ghana Journal of Agricultural Science 35: 41–48.

287. Afrifa, A. A.; joint author (2003). Field studies on the use of Confidor 200SL to control termites on cocoa seedlings, by J. B. Ackonor, J. E. Sarfo, A. Abdul-Karimu, A. Afrifa and A. Nkansah. Journal of the Ghana Science Association 5(2): 132-138.

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288. Afrifa, A. A.; joint author (2005). Cocoa/coconut intercropping trial in Ghana: Effect of the cropping systems on soil nutrient dynamics, by K. Ofori-Frimpong, A. A. Afrifa, K. Osei-Bonsu and M.R. Appiah. In: Proceedings, 14th International Cocoa Research Con-ference, Accra, Ghana, 2003. pp. 303-308.

289. Afrifa, A. A.; joint author (2005). Effect of nitrogen rates and frequency of application on cocoa yield, soil and mineral composition of co-coa leaves, by K. Ofori-Frimpong, A. A. Afrifa and M.R. Ap-piah. In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 239-245.

290. Afrifa, A. A.; joint author (2005). Farmer field school as extension strat-egy in the Ghana cocoa industry: Prospects and challenges, by F. Baah, K. Osei-Bonsu, A. A. Afrifa, K. Afreh-Nuamah and G. Amoako-Gyedu, In: Proceedings, 14th International Cocoa Re-search Conference, Accra, Ghana,. 2003. pp. 1177-1183.

291. Afrifa, A. A.; joint author (2005). The status of cocoa in the agrarian sys-tem of some rural communities surrounding the Kakum Forest Re-serve, Ghana, by K. Osei-Bonsu, F. Baah, A. A. Afrifa, G. Amoako-Gyampah and Y. B. Osei-Wusu. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 1017-1022.

292. Afrifa, A. A.; joint author (2006). Improving the growth of cocoa seedlings in nursery by the use of fertilizers, by K. Ofori-Frim-pong, A. A. Afrifa and M.R. Appiah. Journal of the Ghana Sci-ence Association 8: 85-91.

293. Afrifa, A. A.; joint author (2006). Sustainable cocoa production in Ghana through soil fertility management, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa and K. Opoku-Ameyaw. In: Pro-ceedings of the International Conference on Managing Soil Re-sources of the Tropics for Sustainable Agricultural Productivity and Annual General Meeting of the Soil Science Society of Ghana, 17/18: 121-129.

294. Afrifa, A. A.; joint author (2007). Development of cocoa pod husk-based compost for nursing cocoa seedlings, by K. Ofori-Frimpong, A. A. Afrifa, A. Y. Akrofi and J.E. Sarfo. In: Proceedings, 15th Inter-national Cocoa Research Conference, San Jose, Costa Rica. 2006. pp.1635-1644.

295. Afrifa, A. A.; joint author (2007). Effect of weed control methods on some soil properties of newly planted cocoa farm, by K. Ofori-Frimpong, A. A. Afrifa, F.K Oppong and M. R. Appiah. Ghana Journal of Agricultural Science 40(2): 127-133.

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296. Afrifa, A. A.; joint author (2007). Evaluation of some organic matter recy-cling methods on soil fertility improvement and cocoa productivity, by K. Ofori-Frimpong, A. A. Afrifa, F.M. Amoah and M.R. Ap-piah. In: Proceedings, 15th International Cocoa Research Confer-ence, San Jose, Costa Rica. 2006. pp. 405-411.

297. Afrifa, A. A.; joint author (2007). Soil diagnostic method for formulating fertilizer requirements on cocoa plantations, by D. Snoek, M. K. Abekoe, M. R. Appiah, A. A. Afrifa, K. Ofori-Frimpong. In: Pro-ceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica. 2006. pp. 387-394.

298. Afrifa, A. A.; joint author (2008). Effects of fertilizer on nitrogen contents of berries of three coffee clones and berry infestation by the coffee berry borer, Hypothenemus hampei (Ferr.) (Coleoptera: Scolyti-dae), by E. A. Dwomoh, K. Ofori-Frimpong, A. A. Afrifa and M. R. Appiah. African Journal of Agricultural Research 3: 111-114.

299. Afrifa, A. A.; joint author (In press). Microbial biomass and extractable N and P contents of soils under different weed control methods in co-coa plantation. Paper presented at the 17th Annual General Meet-ing of the Soil Science Society of Ghana, Tamale, Ghana, 26th Feb-ruary-2nd March 2001, by K. Ofori-Frimpong, M. R. Appiah, A. A. Afrifa and F. K. Oppong.

300. Afrifa, A. A.; joint author (In press). Sustainable cocoa production in Ghana, conventional or organic? by A. R Cudjoe, J. B. Ackonor, S. Adimado, R. Adu-Acheampong, J. E. Sarfo and A. A. Afrifa. Journal of the Ghana Science Association.

301. Afrifa, M. K.; joint author (1971). Effect of cutting cola nut on the germi-nation rate and subsequent seedling characters, by D. A. Ll. Brown and Afrifa, M. K. Ghana Journal of Agricultural Science 4: 117-120.

302. Afrifa, M. K.; joint author (1977). Yield and tree girth variability in some Cola nitida populations, by E. E. N. A. Bonaparte, K. Osei-Bonsu and M. K. Afrifa. Acta Horticulturae 53: 329-336.

303. Afrifa, M. K.; joint author (1987). Evaluation of different packaging mate-rials for storage of cola nuts, by K. Osei-Bonsu, M. K. Afrifa and D. A. Brown. In: Proceedings of the 13th Biennial Conference of West African Science Association/15th Biennial Conference of the Ghana Science Association, 1987, Legon, Ghana. pp. 222-228.

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304. Afrifa, M. K.; joint author (1988). The germination of colanut (C. nitida Vent) Schott Endlicher, by K. Osei-Bonsu and M. K. Afrifa. Ghana Journal of Agricultural Science. 2: 33-38.

305. Agene, V. N. joint author (2008). Investigations on Oecophylla longinoda (Latreille) (Hymenoptera: Formicidae) as bio-control agent in the protection of cashew plantation, by E. A. Dwomoh, J. V. K. Afun, J. B. Ackonor and V. N. Agene. Pest Management Science 64: 41-46.

306. Agyente-Badu, C. K.; Oddoye, E. O. K. (2005). Uses of the cocoa by-products. In: Ghana Science Association 24th Biennial Conference. Plenary presentations 1st-4th August, 2005. pp. 115-127.

307. Agyente-Badu, C. K.; joint author (1996). Production of cocoa by-products from fresh cocoa pod wastes and non-traditional products from cocoa beans, by D. Adomako, E. O. Amaning, C. K. Agy-ente-Badu, J. Takrama, Helena Oppong and Esther Gyedu. Cocoa Research Institute of Ghana. Technical Bulletin, no.14. 34p.

308. Agyente-Badu, C. K.; joint author (1998). Utilization of cocoa by-prod-ucts for nutrition, body care and food supply. Paper presented at the 9th Meeting of the Advisory Group on the World Cocoa Econ-omy, 25-30 May, 1998, Valencia, Spain, organised by The Interna-tional Cocoa Organisation, by D. Adomako, E. Osei-Amaning, C. K. Agyente-Badu, E.G. Asante, Esther Gyedu, Helena Op-pong and J. Takrama. London, ICCO. 13p.

309. Agyente-Badu, C. K.; joint author (1999). Pilot plants to process cocoa by-products in Ghana: Revised production cost analysis, by D. Ad-omako, E. Osei-Amaning, C. K. Agyente-Badu, J. F. Takrama and H. Oppong. Tafo, Cocoa Research Institute of Ghana. 32p.

310. Agyente-Badu, C. K.; joint author (2007). Feeding broiler chickens with rations containing dried cocoa pod husk: A practical experience at the Cocoa Research Institute of Ghana, Tafo, by E. O. K. Oddoye, C. K. Agyente-Badu, V. Johnson and E. G. Asante. In: Pro-ceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1423-1427.

311. Ahadzie, S. K.; joint author (2004). Natural enemies of shea defoliator, Cirina forda, by E.A. Dwomoh, A. Y. Akrofi and S. K. Ahadzie. Tropical Science 44(3): 124-127.

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312. Ahenkorah, Y. (1967). Clay minerals in some cocoa growing soils of Ghana. In: Conférence Internationale sur les Recherches Agrono-mique Cacaoyères, [Proceedings, 1st International Cocoa Research Conference], Abidjan, Côte d’Ivoire, 1965. pp. 87-93.

313. Ahenkorah, Y. (1968). Phosphorus retention capacities of some cocoa growing soils of Ghana and their relationship with soil properties. Soil Science 105: 24-30.

314. Ahenkorah, Y. (1969). A note on zinc deficiency in cacao (Theobroma ca-cao L.). Ghana Journal of Agricultural Science 2: 3-6.

315. Ahenkorah, Y. (1969). A study of the distribution of root activity of ma-ture cacao (Theobroma cacao L.) using the P-32 soil injection tech-nique. Ghana Journal of Agricultural Science 2: 97-101.

316. Ahenkorah, Y. (1970). Field investigations on the distribution and activ-ity of mature Amelonado cacao root system using P-32. Technical Report Series No. 144.

317. Ahenkorah, Y. (1971). Potassium-supplying power of some soils of

Ghana cropped to cacao. Soil Science 109: 127-135.

318. Ahenkorah, Y. (1971). The evaluation of intensity, quality, capacity and release of potassium in some soils of Ghana cropped to mature ca-cao. UN/FAO Andre Meyer Research Fellowship Report. 30p.

319. Ahenkorah, Y. (1973). Residual effects of phosphorus and potassium fer-tilizers on shaded cocoa (Theobroma cacao L.) in Ghana. In: Pro-ceedings of the 10th International Potash Institute Colloquium, 1973, Abidjan, Côte d’Ivoire. pp. 507-512.

320. Ahenkorah, Y. (1975). Root activity pattern of four varieties of cocoa trees. IAEA Technical Report Series, No. 170: 55-61.

321. Ahenkorah, Y. (1975). Use of radio-active phosphorus in determining the efficiency of fertilizer utilization by cocoa plantations. Plant and Soil 42: 429-439.

322. Ahenkorah, Y. (1981). The influence of environment on growth and pro-duction of the cacao tree: soils and nutrition. In: Proceedings, 7th International Cocoa Research Conference, Douala, Cameroun. 1979. pp.167-176.

323. Ahenkorah, Y.; Akrofi, G.S. (1968). Amazon cacao (Theobroma cacao L.) shade and manurial experiment (K2-O1) at the Cocoa Research Institute of Ghana. 1. First five years. Agronomy Journal 60: 591-594.

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324. Ahenkorah, Y. Akrofi, G. S. (1969). The status of an Amelonado shade and manurial experiment (K1) at Tafo. In: Memorias da Segunda Conferencia Internacional de Pesquisas em cacau [Proceedings of the 2nd International Cocoa Research Conference], Salvador, Bahia, Brazil, 1967. pp. 325-330.

325. Ahenkorah, Y.; Akrofi, G. S. (1971). Recent results of fertilizer experi-ments on shaded cacao (Theobroma cacao L.) in Ghana. In: Pro-ceedings, 3rd International Cocoa Research Conference, Accra, Ghana, 1969. pp.65-78.

326. Ahenkorah, Y.; Akrofi, G. S. (1977). Amazon cocoa (Theobroma cacao L.) shade and manurial experiment (K2-01 at the Cocoa Research Institute of Ghana. III. Cumulative yield analysis. In: Proceedings, 5th International Cocoa Research Conference, Ibadan, Nigeria, 1975. pp. 291-301.

327. Ahenkorah, Y. Akrofi, G. S.; Adri. A. K. (1974). The end of the first co-coa shade and manurial experiment at the Cocoa Research Insti-tute of Ghana. Journal of Horticultural Science 49: 43-51.

328. Ahenkorah, Y.; Appiah, M. R. (1992). Modal characteristics of soils within the Cocobod plantations of Ghana. In: Soil Resource Man-agement towards Sustainable Agriculture in Ghana: The Role of the Soil Scientist. Proceedings of the 12th and 13th Annual General Meetings of the Soil Science Society of Ghana. pp. 25-32.

329. Ahenkorah, Y.; Appiah, M. R. (1996). Promoting food security through soil fertility management in food and non-food crops. In: Proceed-ings of the National Workshop on Soil Fertility Management Action Plan for Ghana, held at Cape Coast, Ghana, 2nd to 5th July, 1996. pp. 61-75.

330. Ahenkorah, Y.; Appiah, M. R.; Halm, B. J. (1987). Review of foliar fertlisation of some tropical perennial crops and effect of three fo-liar fertilisers on cocoa seedlings. Planter 63: 3-15.

331. Ahenkorah, Y.; Appiah, M. R.; Halm, B. J.; Dodoo. R. E. (1988). Pro-duction and utilisation of cocoa pod husk as source of potash fer-tiliser. In: Proceedings, 10th International Cocoa Research Confer-ence, Santo Domingo, Dominican Republic. 1987. pp. 843-848.

332. Ahenkorah, Y.; Appiah, M. R.; Halm, B. J.; Dodoo, R. E. (1990). Pro-duction and utilisation of cocoa pod husk as source of potash fertil-izer. In: Proceedings of the 11th Annual General Meeting of the Soil Science Society of Ghana. 1988. pp.77-87.

333. Ahenkorah, Y.; Halm, B. J. (1976). Potting media for growing cocoa seedlings. Ghana Journal of Agricultural Science 9: 207-210.

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334. Ahenkorah, Y. Halm, B. J. (1977). Cocoa bean viability during pod stor-age and seedling performance in the nursery. In: Proceedings, 6th International Cocoa Research Conference, Caracas, Venezuela. 1977. pp. 539-545.

335. Ahenkorah, Y.; Halm, B. J. (1981). Foliar analysis as a diagnostic tech-nique in cocoa nutrition. III. Standard curves and observations. In: Proceedings, 7th International Cocoa Research Conference, Douala, Cameroun. 1979. pp.177-182.

336. Ahenkorah, Y.; Halm, B. J.; Akrofi, G. S. (1977). Some agronomic fac-tors affecting cocoa rehabilitation in Ghana. In: Proceedings, 5th International Cocoa Research Conference, Ibadan, Nigeria, 1975. pp.199-203.

337. Ahenkorah, Y.; Halm, B. J.; Akrofi, G. S. (1983). Techniques and meth-ods used for the identification of suitable soils for growing cocoa in Ghana. In: Proceedings of the Cacao Soils Workshop, 1977, Brazil. pp. 45-55.

338. Ahenkorah, Y.; Halm, B. J.; Amonoo, R. S. (1981) Cocoa pod husk as source of potassium fertilizer. Turrialba 31: 287-292.

339. Ahenkorah, Y.; Halm, B. J.; Appiah, M. R.; Akrofi, G. S. (1982). Fertil-izer use on cacao rehabilitation projects in Ghana. In: Proceedings, 8th International Cocoa Research Conference, Cartagena, Colom-bia. 1981. pp.165-170.

340. Ahenkorah, Y.; Halm, B. J.; Appiah, M. R.; Akrofi, G. S.; Yirenkyi, J. E. K. (1987). Twenty years' results from a shade and fertilizer trial on Amazon cocoa (Theobroma cacao L.) in Ghana. Experimental Agriculture 23: 31-39.

341. Ahenkorah, Y.; Oteng, J.W.; Asuming-Brempong, S. (1989). Soil and agri-cultural practices towards the economic recovery programme of Ghana: Soil chemistry and fertility input. In: Proceedings of the 13th

Annual General Meeting of the Soil Science Society of Ghana. pp. 89-94.

342. Ahenkorah, Y.; joint author (1976). Phospholipid P content of some co-coa soils of Ghana, by B. J. Halm and Y. Ahenkorah. Ghana Jour-nal of Agricultural Science 9: 3-8.

343. Ahenkorah, Y.; joint author (1978). Phosphate status and phosphorus adsorption isotherms of some soils of Ghana under cocoa, by B. J.

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Halm and Y. Ahenkorah. Ghana Journal of Agricultural Science 11: 185-194.

344. Ahenkorah, Y.; joint author (1981). Available phosphorus in some cacao soils of Ghana, by B. J. Halm and Y. Ahenkorah. In: Proceedings, 7th International Cocoa Research Conference, Douala, Cameroun. 1979. pp. 183-188.

345. Ahenkorah, Y.; joint author (1982). Inositol penta– and hexa-phosphate content of some cocoa soils in Ghana, by B. J. Halm, Y. Ahenkorah and M. R. Appiah. Zeits. pflanzen. Bodenk. 145: 586-592

346. Ahenkorah, Y.; joint author (1985). Phosphatase activity of soils as af-fected by cocoa pod ash, by M. R. Appiah, B. J. Halm, and Y. Ahenkorah. Soil Biology and Biochemistry 17: 823-826.

347. Ahenkorah, Y.; joint author (1988). Effects of successive air-drying and rewetting cycles on the inositol phosphate content and phos-phatase activity of soils, by M. R. Appiah and Y. Ahenkorah. In: Proceedings of the11th Annual General Meeting Soil Science Soci-ety of Ghana. pp. 63-66.

348. Ahenkorah, Y.; joint author (1989). Arylsulphatase activity of different latosol soils of Ghana cropped to cocoa (Theobroma cacao L.) and coffee (Canephora var Robusta), by M. R. Appiah and Y. Ahenkorah. Biol. Fertility Soils 7: 186-190.

349. Ahenkorah, Y.; joint author (1989). Determination and available sulfate in some soils of Ghana using five extraction methods, by M. R. Appiah and Y. Ahenkorah. Biol. Fertility Soils 8: 80-86.

350. Ahenkorah, Y.; joint author (1990). Note on the effect of cocoa pod ash on some forms of soil potassium in Ghana, by M. R. Appiah, K. Ofori-Frimpong and Y. Ahenkorah. Planter 66: 227-232.

351. Akotoye, N. A. K. (1975). Biology of Characoma stictigrapta Hamps. In: Proceedings of the 4th Conference West African Cocoa Entomolists, 1974, Legon, Accra, Ghana. pp. 150-159.

352. Akotoye, N. A. K. (1975). The biology of Characoma stictigrapta Hamp-son (Lepidoptera: Noctuidae), a pod and leaf feeding pest of cocoa in Ghana. M. Sc. Thesis, Entomology, University of Ghana, Legon. 274p.

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353. Akotoye, N. A. K. (1979). Economic importance of Characoma sticti-grapta Hampson, a lepidopterous (Noctuidae) pest of cocoa in Ghana. Bulletin of Entomological Research 69: 387-394.

354. Akotoye, N. A. K.; Kumar, R. (1977). Natural enemies of Characoma stictigrapta Hampson (Lepidoptera: Noctuidae): a pest of cocoa leaves and pods in Ghana. In: Proceedings, 5th International Cocoa Research Conference, Ibadan, Nigeria, 1975. pp. 443-447.

355. Akrofi, A. Y. (1992). Development and use of molecular identification techniques for fungi of the Gaeumannomyces-Phialophora com-plex. M. Sc. Dissertation. University of Bristol, Bristol, UK. 40p.

356. Akrofi, A. Y. (2000). A review of the Phytophthora pod rot disease situa-tion in Ghana. Journal of the Ghana Science Association 2(3): 218-228.

357. Akrofi, A. Y. (2004). The status of research on the management of fungal diseases of cocoa in Ghana. In: Proceedings of INCOPED 4th Inter-national Cocoa Pests and Diseases Seminar, 2003, Accra, Ghana. pp. 27-36.

358. Akrofi, A. Y. (2006). Incidence and severity of coffee leaf rust in Ghana. Journal of the Ghana Science Association 7(2): 42-46.

359. Akrofi, A. Y.; Ansah, I. O. O.; Sarfo, J. E.; Amoah, F. M.; Nathaniels N.; Holmes K.; Gyamfi, I.; Adu-Kumi, M.; Cobbah, E. (2007). Participa-tory video: A tool for effective dissemination of improved agro-nomic technologies among cocoa farmers in Ghana. In: Proceed-ings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1737-1742.

360. Akrofi, A. Y.; Appiah, A. A; Opoku, I.Y (2003). Management of Phy-tophthora pod rot disease on cocoa farms in Ghana, Crop Protec-tion 22, 469-477.

361. Akrofi, A. Y.; Opoku, I. Y. (2000). Managing the Phytophthora pod rot disease of cocoa: the Ghana experience. In: Proceedings of IN-COPED 3rd International Cocoa Pests and Diseases Seminar, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 78-83.

362. Akrofi, A. Y.; Opoku, I. Y. (2001). Phytophthora invasion of cocoa pod and bean. Journal of the Ghana Science Association 4: 56-62.

363. Akrofi, A. Y.; Opoku, I. Y. (2005). The spread of Phytophthora megakarya in Ghana: Implications for disease management. In: Proceedings, 14th International Cocoa Research Conference, Ac-cra, Ghana, 2003. pp. 1353-1358.

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364. Akrofi, A. Y.; Opoku, I. Y.; Appiah, A. A. (1997) On-farm farmer-man-aged fungicide trials to control blackpod disease caused by Phy-tophthora megakarya in Ghana. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar 1995, Accra, Ghana. pp.109-118.

365. Akrofi, A. Y.; Opoku, I. Y.; Assuah, M. (2007). Meeting farmers’ de-mands: Production and supply of safe planting materials from Phy-tophthora megakarya affected cocoa seed gardens in Ghana. In: Proceedings of INCOPED 5th International Cocoa Pests and Dis-eases Seminar, 2006, San Jose, Costa Rica. pp. 79-85.

366. Akrofi, A. Y.; Pereira, J. L.; (2007). Towards a sustainable cocoa econ-omy: the role of The International Working Group on Cocoa Pests and Diseases (INCOPED). In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1055-1059.

367. Akrofi, A. Y.; joint author (1994). Identification of fungi in the Gaeuman-nomyce-Phialophora complex by RFLPs of PCR-amplified ribosomal DNA’s, by E. Ward and A. Y. Akrofi. Mycological Research 98: 219-224.

368. Akrofi, A. Y.; joint author (1994). The current status and distribution of Phytophthora megakarya in Ghana, by M. C. Luterbacher and A. Y. Akrofi. In: Proceedings, 11th International Cocoa Research Con-ference, Yamoussoukro, Republique de Côte d’Ivoire, 1993. pp. 29-35.

369. Akrofi, A. Y.; joint author (1997). The spread of Phytophthora megakarya on cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 98-107.

370. Akrofi, A. Y.; joint author (1998). Trunk injection of potassium pospho-nate for the control of black pod disease of cocoa, by I. Y. Opoku, A. Y. Akrofi, A. A. Appiah and M. C. Luterbacher. Tropical Sci-ence 38: 179-185.

371. Akrofi, A. Y.; joint author (1999). Phytophthora species differentiation by analysis of randomly amplified polymorphic DNAs, by S. T. Sackey, A. Y. Akrofi, A. A. Appiah and I. Y. Opoku. In: Pro-ceedings, 12th International Cocoa Research Conference, Sal-vador, Bahia, Brazil, 1996. pp. 107-112.

372. Akrofi, A. Y.; joint author (1999). The occurrence and distribution of Phy-tophthora canker on cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. In: Proceedings, 12th International Cocoa Re-search Conference, Salvador, Bahia, Brazil, 1996. pp. 113-119.

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373. Akrofi, A. Y.; joint author (1999). The spread of Phytophthora megakarya on cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi and A. A. Ap-piah. Journal of the Ghana Science Association 2: 110-116.

374. Akrofi, A. Y.; joint author (2000). An outbreak of pink disease of cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi, K. Osei-Bonsu and K. Acheampong. In: Proceedings,13th International Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2001. pp. 761-767

375. Akrofi, A. Y.; joint author (2000). Phytophthora megakarya : A potential threat to the cocoa industry in Ghana, by I. Y. Opoku, A. A. Ap-piah, A. Y. Akrofi and G. K. Owusu. Ghana Journal of Agricul-tural Science 33: 237-248.

376. Akrofi, A. Y.; joint author (2002). Shade trees are alternative hosts of the cocoa pathogen, Phytophthora megakarya, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. Crop Protection, 21: 629-634.

377. Akrofi, A. Y.; joint author (2003). Control of Phytophthora megakarya dis-eases of cocoa with phosphonic acid, by M. Holderness, K. Holmes, I. Opoku, A. Akrofi, G. Asante, J. N. Boafo, J. Takrama, B. King and J. Cox. Final Technical Report, DFID project R7326, Crop Protection Research Programme. 142p.

378. Akrofi, A. Y.; joint author (2004). Natural enemies of shea defoliator, Ci-rina forda, by E. A. Dwomoh, A. Y. Akrofi and S. K. Ahadzie. Tropical Science 44: 124-127.

379. Akrofi, A. Y.; joint author (2004). Natural occurrence and distribution of stem cankers caused by Phytophthora megakarya and Phytoph-thora palmivora on cocoa, by A. A. Appiah, I. Y. Opoku and A. Y. Akrofi. European Journal of Plant Pathology 110: 983–990.

380. Akrofi, A. Y.; joint author (2004). Phosphonic acid: An alternative ap-proach to the control of blackpod disease of cocoa caused by Phy-tophthora megakarya, by I. Y. Opoku, A. Y. Akrofi, M. Holder-ness, and K. A. Holmes. In: Proceedings of INCOPED 4th Interna-tional Cocoa Pests and Diseases Seminar, 2003, Accra, Ghana. pp. 59-69.

381. Akrofi, A. Y.; joint author (2005). Effects of two herbicides and four fungi-cides on insect pollination of cocoa, by Sarfo, J. E.; Padi, B.; Op-pong, F. K.; Opoku, I. Y.; Akrofi, A. Y. In: Proceedings, 14th In-ternational Cocoa Research Conference Accra, Ghana, 2003, 1349-1352.

382. Akrofi, A. Y.; joint author (2005). Selection of cocoa genotypes as par-ents for resistance to Phytophthora megakarya and Phytophthora palmivora, by I. Y. Opoku, A. Y. Akrofi, A. Abdul-Karimu and

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Y. Adu-Ampomah. In: Proceedings, 14th International Cocoa Re-search Conference, Accra, Ghana, 2003. pp. 817-825.

383. Akrofi, A. Y.; joint author (2005). Vegetative propagation of kola (Cola ni-tida (Vent.) Schott and Endl.) by stem cuttings, by F. M. Amoah, K. Osei-Bonsu, A. Y. Akrofi and A. Abdul Karimu, Ghana Jour-nal of Agricultural Science 38: 43-53.

384. Akrofi, A. Y.; joint author (2006). Assessment of sanitation and fungicide application directed at the cocoa tree trunks for the control of Phy-tophthora blackpod infections in pods growing in the canopy, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. European Journal of Plant Pathology 117:167-173

385. Akrofi, A. Y.; joint author (2007). Development of cocoa pod husk-based compost for nursing cocoa seedlings, by K. Ofori-Frimpong, A. A. Afrifa, A. Y. Akrofi and J. E. Sarfo. In: Proceedings, 15th In-ternational Cocoa Research Conference, San Jose, Costa Rica. 2006. pp.1635-1644.

386. Akrofi, A. Y.; joint author (2007). Farmers’ fields: Potential source of blackpod resistant materials, by I. Y. Opoku, A. Y. Akrofi, Y. Adu-Ampomah and M. K. Assuah. In: Proceedings, 15th Interna-tional Cocoa Research Conference, San Jose, Costa Rica. 2006. pp. 1015-1022.

387. Akrofi, G. S.; joint author (1968). Amazon cacao (Theobroma cacao L.) shade and manurial experiment (K2-O1) at the Cocoa Research In-stitute of Ghana. 1. First five years, by Y. Ahenkorah and G. S. Akrofi. Agronomy Journal 60: 591-594.

388. Akrofi, G. S.; joint author (1971). Recent results of fertilizer experiments on shaded cacao (Theobroma cacao L.) in Ghana, by Y. Ahenko-rah and G. S. Akrofi. In: Proceedings, 3rd International Cocoa Re-search Conference, Accra, Ghana, 1969. pp. 65-78.

389. Akrofi, G. S.; joint author (1974). The end of the first cocoa shade and manurial experiment at the Cocoa Research Institute of Ghana, by Y. Ahenkorah, G. S. Akrofi and A. K. Adri. Journal of Horticul-tural Science 49: 43-51

390. Akrofi, G. S.; joint author (1977). Amazon cocoa (Theobroma cacao L.) shade and manurial experiment (K2-01) at the Cocoa Research In-stitute of Ghana. III. Cumulative yield analysis, by Y. Ahenkorah and G. S. Akrofi. In: Proceedings, 5th International Cocoa Re-search Conference, Ibadan, Nigeria, 1975. pp. 291-301.

391. Akrofi, G. S. joint author (1977). Some agronomic factors affecting cocoa rehabilitation in Ghana, by Y. Ahenkorah, B. J. Halm and G. S. Akrofi. In: Proceedings, 5th International Cocoa Research Confer-ence, Ibadan, Nigeria, 1975. pp. 199-203.

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392. Akrofi, G. S.; joint author (1982). Fertilizer use on cacao rehabilitation projects in Ghana, by Y. Ahenkorah, B. J. Halm, M. R. Appiah and G. S. Akrofi. In: Proceedings, 8 International Cocoa Research Conference, Cartagena, Colombia. 1981. pp.165-170.

393. Akrofi, G. S. joint author (1983). Techniques and methods used for the identification of suitable soils for growing cocoa in Ghana, by Y. Ahenkorah, B. J. Halm and G. S. Akrofi. In: Proceedings of the Cacao Soils Workshop, 1977, Brazil. pp. 45-55.

394. Akrofi, G. S.; joint author (1987). Twenty years' results from a shade and fertilizer trial on Amazon cocoa (Theobroma cacao L.) in Ghana, by Y. Ahenkorah, B. J. Halm, M. R. Appiah, G. S. Akrofi and J. E. K. Yirenkyi. Experimental Agriculture 23: 31-39.

395. Akuoku, S.; joint author (1990). Improvement of cocoa seedling estab-lishment: response to water stress with soil conditioners, by E. B. Frimpong, A. O. Dwapanyin, R. S. Amonoo, J. N. Boafo and S. Akuoko. In: Proceedings of the 1st International Conference on Tree Crops, 1990, Owerri, Nigeria. pp. 20-23.

396. Akuoku, S.; joint author (1994). Effects of soil mulches and anti-transpi-rant on the control of moisture stress in cocoa seedlings in a mar-ginal area, by E. B. Frimpong, A. D. Oppong, S. Akuoku and R. S. Amonoo. In: Proceedings,11th International Cocoa Research Conference, Yamoussoukro, Republique de Côte d’Ivoire. 1993. pp. 833-835.

397. Akuoku, S.; joint author (1998). Optimising growth in relation to light regime and development of improved Robusta coffee, by E. B. Frimpong, Y. Adu-Ampomah, J. Sarfo, J. E. and S. Akuoko. Journal of the Ghana Science Association 1(2): 12-16.

398. Allen, R. C.; joint author (1999). Combining abilities for yield and vegeta-tive traits of Upper Amazon cocoa selections in Ghana, by B. Ado-mako, R.C. Allen, and Y. Adu-Ampomah. Plantations Recherche Développement 6: 183-189.

399. Allen, R. C.; joint author (1999). Evaluation of hybrids between Upper Amazon cocoa selections in Ghana, by B. Adomako, R.C. Allen and Y. Adu-Ampomah. Plantations Recherche Développement 6: 455-462.

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400. Allison, H. W. S.; Cunningham, R. K. (1959). Preparing land for cacao in Ghana: land clearance for field experimentation. World Crops 11: 311-313.

401. Allison, H. W. S.; Dunn, E. (1961). Cocoa establishment on clear-felled land. In: Report of the Cocoa Conference held at Grosvenor House, London, 12th to 14th September 1961. London, The Cocoa, Choco-late and Conference Alliance. pp. 59-66.

402. Allison, H. W. S.; Kenten, R. H. (1959). Tray fermentation of West African Amelonado cacao. First FAO Technical Cacao Meeting, 6th

Technical Session, Accra, Ghana, 8-15 February 1959. 2p. Mimeo-graphed.

403. Allison, H. W. S.; Kenten, R. H. (1963). Seasonal variations in the fer-mentation of West African Amelonado cocoa. Tropical Agriculture 40: 217-221.

404. Allison, H. W. S.; Kenten, R. H. (1963). Tray fermentation of cocoa. Tropical Agriculture 40: 15-24

405. Allison, H. W. S.; Kenten, R. H. (1994). Mechanical drying of cocoa. Tropical Agriculture 41: 115-119.

406. Allison, H. W. S.; Kenten, R. H.; Rohan, T. A. (1958). A new approach to the fermentation of West African Amelonado cocoa. Tropical Agriculture 35: 279-288.

407. Allison, H.W.S.; Smith, R. W. (1964). Economics of cacao establish-ment on clear-felled land. World Crops. 16(3): 31-36.

408. Amaning, K. O.; joint author (1999). Effect of diets containing varying levels of cocoa pod husk (CPH) and NaOH-treated corn cob on the reproductive performance of confined Djallonke sheep, by A. K. Tuah, F. Y. Obese, D. B. Osei, D. B. Okai, Adomako, D.; E . Boye-Frimpong and K. O. Amaning. In: Proceedings, 12th Interna-tional Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 1047-1052.

409. Ameyaw, G. A.; joint author (2008). Cocoa swollen shoot disease and control, by O. Domfeh, V. Johnson, H. Dzahini-Obiatey and G. A. Ameyaw. Cocoa Research Institute of Ghana. Technical Bul-letin, no. 17. Tafo – Akim, Ghana, CRIG. 20p.

410. Ameyaw Akumfi, G.; joint author (2006). Control of cocoa swollen shoot disease by eradication of infected trees in Ghana: a survey of

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treated and replanted, by H. Dzahini-Obiatey, G. Ameyaw Ak-umfi and L. A. Ollennu. Crop Protection 25: 647-652.

411. Ameyaw Akumfi, G.; joint author (2007). Eradication of cocoa swollen shoot disease in Ghana: Is the battle being won or lost? by H. Dza-hini-Obiatey, G. Ameyaw Akumfi, L. A. A. Ollennu. In: Pro-ceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 899-906.

412. Ameyaw Oduro, C.; Osei-Bonsu, K.; Tetteh, J. P. (2005). Traditional cocoa agroforestry: 2. Indigenous selection criteria for shade trees on cocoa farms in a typical cocoa growing district in Ghana. In: Proceedings, 14th International Cocoa Research Conference, Ac-cra, Ghana, 2003. pp. 515-522.

413. Amoah, F. M. (2004). The effect of seed treatment, propagation media and day/night temperature on germination, early seedling devel-opment and dry matter partitioning in cocoa. Journal of the Ghana Science Association 4(2): 63-72.

414. Amoah, F. M. (2004). The effects of solution temperature, propagation media and cultivar on the growth and macro nutrient uptake in young cocoa plants in flowing nutrient solution. Journal of the Ghana Science Association 6(1): 73-83.

415. Amoah, F. M. (2005). Effects of moisture stress on growth and nutrient uptake in cacao seedlings. Ghana Journal of Agricultural Science 38: 55-64.

416. Amoah, F. M. (2005). The effect of seed treatment and depth of sowing on germination and initial seedling development in cocoa. Journal of Horticulture 4: 45-51.

417. Amoah, F. M. (2005). The germination and early growth of cashew (Anacardium occidentale). Tropical Science 45(4): 149-152.

418. Amoah, F. M. (2006). Review of vegetative propagation of cacao (Theo-broma cacao L.) by rooted cuttings. 1. Physiological considera-tions. Ghana Journal of Agricultural Science 39(2): 209-216.

419. Amoah, F. M. (2006). Review of vegetative propagation of cacao (Theo-broma cacao L.) by rooted cuttings. 2. Environmental and technical considerations. Ghana Journal of Agricultural Science 39(2): 217-226.

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420. Amoah, F. M.; Fordham, R. (1997). A new technique for raising young co-coa plants. Plantations Recherché Développement 4: 15-24.

421. Amoah, F. M.; Johnson, V.; Yeboah, J. (2007). Vegetative anatomy, carbohydrate levels and nodal position of cuttings on stock plant on rooting in cacao stem cuttings. In: Proceedings, 15th Interna-tional Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 749-758.

422. Amoah, F. M.; Nuertey, B. N.; Baidoo-Addo, K.; Oppong, F.K.; Osei-Bonsu, K.; Asamoah, T. E. O. (1995). Underplanting oil palm with cocoa in Ghana. Agroforestry Systems 30: 289-299.

423. Amoah, F. M.; Nuertey, B. N.; Oppong, F. K.; Osei-Bonsu, K.; Opoku-Ameyaw, K.; Asamoah, T. E. O. (2005). The establishment and early yield of cocoa interplanted in oil palm plantation. Journal of the Ghana Science Association 8(2): 124-131.

424. Amoah, F. M.; Nuertey, B. N.; Osei-Bonsu, K.; Oppong, F. K., Marfo-Ahenkora, E.; Asamoah, T. E. O. (2002). The effect of spacing and shade on coffee growth and yield on hill tops in an oil palm planta-tion. Journal of the Ghana Science Association 4(2): 73-79.

425. Amoah, F. M.; Opoku-Ameyaw, K.; Osei-Bonsu, K.; Oppong, F. K. (1999) Evaluation of bare-rooted methods for transplanting cocoa seedlings. Ghana Journal of Agricultural Science 32: 69-77.

426. Amoah, F. M.; Opoku-Ameyaw, K.; Osei-Bonsu, K.; Oppong, F. K. (2001). The effect of seedling age on the survival rate of trans-planted bare-rooted cocoa seedlings. In: Proceedings, 13th Inter-national Cocoa Research Conference, Kota Kinabalu, Malaysia, 2000. pp. 1215-1219.

427. Amoah, F. M.; Opoku-Ameyaw, K.; Osei-Bonsu, K.; Oppong, F. K. (2005). The effect of seedling age at transplanting on the growth and early yield of bare-root cocoa seedlings. Proceedings, 14th In-ternational Cocoa Research Conference, Accra, Ghana, 2003. pp.1309-1314.

428. Amoah, F.M., Osei-Bonsu, K., Akrofi, A. Y.; Abdul-Karimu, A. (2005). Vegetative propagation of kola (Cola nitida (Vent.) Schott and Endl.) by stem cuttings. Ghana Journal of Agricultural Science 38, 43-53.

429. Amoah, F. M.; Osei-Bonsu, K.; Oppong, F. K. (1997). Responses of improved Robusta coffee to location and management practices in Ghana. Experimental Agriculture 33: 103-111.

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430. Amoah F. M.; Osei-Bonsu, K.; Oppong, F. K. (1997). The effect of shade, stem number and spacing on Robusta coffee yield in Ghana. In: Proceedings of 17th International Scientific Colloquium on Coffee, Nairobi, Kenya, 1997. Paris, ASIC. pp. 528-534.

431. Amoah, F. M.; Osei-Bonsu, K.; Oppong, F. K. (1999). The effect of shade and spacing on the growth and yield of improved Robusta coffee (Coffea canephora) in Ghana. Journal of the Ghana Science Association 2(2): 109-113.

432. Amoah, F. M.; Osei-Bonsu, K.; Oppong, F. K.; Opoku-Ameyaw, K. (2002). The effect of spatial arrangement on the growth, yield and management practices of Robusta coffee (Coffea canephora) in Ghana. Tropical Science 42: 656-662.

433. Amoah, F. M.; Osei-Bonsu, K.; Oppong, F. K.; Opoku-Ameyaw, K.; Ofori-Frimpong, K. (2005). The effect of mulch on the establish-ment and early yield of cocoa In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 1301-1308.

434. Amoah, F. M.; joint author (1989). Coffee seed germination. 1. Effect of ripening and processing on coffee (Coffea canephora) seed germi-nation, by K. Osei-Bonsu, K. Opoku-Ameyaw, F. M. Amoah and K. Acheampong. Café, Cacao, Thé 33: 219-222.

435. Amoah, F. M.; joint author (1989). Coffee seed germination. II The ef-fects of some pre-treatments on coffee (Coffea canephora) seed germination, by K. Osei-Bonsu, S. T. Ampofo, F. M. Amoah. Café, Cacao, Thé 33: 223-228.

436. Amoah, F. M.; joint author (1990). Evaluation of the use of herbicides for weed control in cocoa and coffee plantations in Ghana, by F. K Oppong, K. Osei-Bonsu and F. M. Amoah. In: Proceedings of the 3rd Tropical Weed Science Conference, 1990. Kuala Lumpur, Malaysian Plant Protection Society. pp.139-44.

437. Amoah, F. M.; joint author (1993). Effect of time of harvesting on yield and harvest quality of Robusta coffee, by K. Osei-Bonsu, F. M. Amoah, F. K. Oppong, F. S. Gyampoh. In: Proceedings of 15th International Scientific Colloquium on Coffee, Montpellier, France. Paris, ASIC. 1993. pp. 803-806.

438. Amoah, F. M.; joint author (1994). Effects of density and slashing of Chromolaena odorata on the growth of young cocoa seedlings, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. In: Proceed-ings, 11th International Cocoa Research Conference, Yamous-soukro, Republique de Côte d’Ivoire, 1993. pp. 941-945.

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439. Amoah, F. M.; joint author (1996). Shea (Vitellaria paradoxa) intercrop-ping systems in northern Ghana : effect of cultural practices and crop combinations on the performance of shea seedlings, by K. Osei-Bonsu, M. R. Appiah, F. M. Amoah and F. K. Oppong. Ghana Journal of Agricultural Science 29: 3-8.

440. Amoah, F. M.; joint author (1997). Appraisal of methods for the eradica-tion of cocoa swollen shoot virus-infected cocoa trees, by K. Osei-Bonsu, S. T. Ampofo, F. K. Oppong and F. M. Amoah. In: Pro-ceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 213-217.

441. Amoah, F. M.; joint author (1997). Effectiveness of Glyphosate in control-ling weeds during cocoa establishment, by F. K. Oppong, K. Osei-Bonsu, F. M. Amoah and K. Acheampong. In: Proceed-ings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 280-285.

442. Amoah, F. M.; joint author (1998). Evaluation of Basta (Glufosinate am-monium) for weed control in coffee, by F. K. Oppong, K. Osei-Bonsu, F. M. Amoah and K. Opoku-Ameyaw. Journal of the Ghana Science Association 1(1): 60-68.

443. Amoah, F. M.; joint author (1998). Potential use of Flemingia macro-phylla as mulch for managing weeds in young cocoa in Ghana, by F. K. Oppong, K. Osei-Bonsu, F. M. Amoah and K. Acheam-pong. Ghana Journal of Agricultural Science 31: 67-72.

444. Amoah, F. M.; joint author (1998). The establishment and early yield of cocoa intercropped with food crops in Ghana, by K. Osei-Bonsu, F. M. Amoah and F. K. Oppong. Ghana Journal of Agricultural Science 31: 45-53.

445. Amoah, F. M.; joint author (1999). Economic evaluation of shea (Vitel-laria paradoxa) food intercropping systems in northern Ghana, by K. Osei-Bonsu, E. G. Asante, M. R. Appiah, F. M. Amoah and F. K. Oppong. Journal of the Ghana Science Association (Special edition) 2(3): 70-80.

446. Amoah, F. M.; joint author (1999). Evaluation of the initial performance of multiple stands of hybrid cocoa in Ghana, by K. Osei-Bonsu, F. K. Oppong, F. M. Amoah and K. Acheampong. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 361-366.

447. Amoah, F. M.; joint author (1999). Nutrient status and rooting of Robusta coffee (Coffea canephora) Pierre ex Froehner cuttings from stock

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plants under Gliricidia sepium, by G. J. Anim-Kwapong, Esther Anim-Kwapong and F. M. Amoah. Tropical Agriculture 76: 263-268.

448. Amoah, F. M.; joint author (1999). Preliminary investigations into the use of inter-cropping for weed management in young coffee in Ghana, by K. Opoku-Ameyaw, F. K. Oppong, F. M. Amoah and K. Osei-Bonsu. In: Proceedings of the 18th International Scientific Colloquium on Coffee; 1999, Helsinki, Finland. Paris, ASIC. pp. 441-444.

449. Amoah, F. M.; joint author (1999). The effect of time of planting at stake on cocoa seedling survival, by F. K. Oppong, K. Opoku-Ameyaw, K. Osei-Bonsu, F. M. Amoah, K. M. Brew and K. Acheampong. Ghana Journal of Agricultural Science 32: 79-86.

450. Amoah, F. M.; joint author (1999). The efficacy of low volume application of Roundup (Glyphosate) on weed suppression in some plantation crops in Ghana, by F. K Oppong, K. Osei-Bonsu and F. M. Amoah. Journal of the Ghana Science Association 2: 40-48.

451. Amoah, F. M.; joint author (1999). The response of some cocoa hybrids to density and pruning, by K. Osei-Bonsu, F. M. Amoah, F. K. Oppong and R. S. Amonoo. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil. 1996. pp. 361-366.

452. Amoah, F. M.; joint author (2000). Evaluation of some leguminous species for the establishment of Robusta coffee in Ghana, by K. Osei-Bonsu, G. J. Anim-Kwapong and F. M. Amoah. In: Pro-ceedings of the 18th International Science. Colloquium on Coffee, 1999, Helsinki, Finland. pp. 438-440.

453. Amoah, F. M.; joint author (2001). The effect of shade, variety and spac-ing on cocoa yield at the Cocoa Research Institute of Ghana (CRIG), by K. Osei-Bonsu, K. Acheampong and F. M. Amoah. Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Malaysia, 2000. pp. 1223-1231.

454. Amoah, F. M.; joint author (2002). Cocoa-coconut intercropping in Ghana: agronomic and economic perspectives, by K. Osei-Bonsu, K. Opoku-Ameyaw, F. M. Amoah, F. K. Oppong. Agroforestry Systems 55(1): 1-8.

455. Amoah, F. M.; joint author (2002). Studies into vegetative propagation on the sheanut (Vitellaria paradoxa Gaernt) tree, by K. Opoku-Ameyaw, F. M. Amoah and J. Yeboah. Journal of the Ghana Sci-ence Association 4: 138-145.

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456. Amoah, F. M.; joint author (2002). The movement and persistence of triclopyr (Garlon 2) in some Ghanaian cocoa growing soils, by F. K. Oppong, M. R. Appiah, K. Osei-Bonsu and F. M. Amoah. In: Managing Soils for Sustainable Production of Food and Industrial Crops: Proceedings of the 16th Annual General Meeting of the Soil Science Society of Ghana, 1999. pp. 49-56.

457. Amoah, F. M.; joint author (2003). Germination and initial seedling de-velopment of cocoa (Theobroma cacao L) as influenced by pod age and sowing depth, by A. A. Addo-Quaye, F. M. Amoah, A. Adarkwa and A. A. Darkwa, Ghana Journal of Horticulture 2: 38-44.

458. Amoah, F. M.; joint author (2003). Intercropping Robusta coffee with some edible crops in Ghana: agronomic performance and eco-nomic returns, by K. Opoku-Ameyaw, F. K. Oppong, K. Ofori-Frimpong, F. M. Amoah and K. Osei-Bonsu. Ghana Journal of Agricultural Science 36: 13-21.

459. Amoah, F. M.; joint author (2003). Kola germplasm collection and con-servation at the Cocoa Research Institute of Ghana, by A. Abdul-Karimu, K. Osei-Bonsu, Y. Adu-Ampomah, F. M. Amoah, G. J. Anim-Kwapong, J. F. Takrama, J. E. Sarfo and K. Acheam-pong. Journal of the Ghana Science Association 6(1): 139-146.

460. Amoah, F. M.; joint author (2003). The effect of propagation media and wood-type on rooting of coffee stem cuttings, by E. Ofori-Gyamfi, E. B. Frimpong, F. M. Amoah and J. P. Tetteh. Journal of the Ghana Science Association 5(1): 26-34.

461. Amoah, F. M.; joint author (2003). The seed bank of weed species in three ecosystems in a semi-deciduous forest zone in Ghana, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. Tropical Science 43: 80-85.

462. Amoah, F. M.; joint author (2005). Agronomic and economic evaluation of different weed management options in young cocoa, by F. K. Oppong, E. G. Asante, K. Osei-Bonsu, K. Acheampong, F.M. Amoah. In: Proceedings, 14th International Cocoa Research Con-ference, Accra, Ghana,. 2003. pp. 291-301.

463. Amoah, F. M.; joint author (2006). Cashew production guide, by K. Opoku-Ameyaw, F. M. Amoah, K. Acheampong, E. Agye-man-Dwomoh, M. Assuah, E. Swatson and S. Osei-Akoto. Accra, Ghana, Crop Services Directorate, Ministry of Food and Agriculture. 35p.

464. Amoah, F. M.; joint author (2006). Effects of sulfosate on weed suppres-sion, cocoa pod set, and yield of cocoa and coffee, by F. K. Op-pong, J. E. Sarfo, K. Osei-Bonsu and F. M. Amoah. Ghana Journal of Agricultural Science 39(2): 115-122.

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465. Amoah, F. M.; joint author (2006). Income intensification strategy: De-termination of the optimum time to underplant oil palm with co-coa, by B. N. Nuertey, F. M. Amoah, A. Opoku, T. E. O. Asamoah, F. K. Oppong, K. Osei-Bonsu and E. Marfo-Ahenkora. Journal of the Ghana Science Association 8: 26-37.

466. Amoah, F. M.; joint author (2007). A field study on the impact of mulching on incidence of termite pests on cocoa seedlings, by J. B. Ackonor and F. M. Amoah. In: Proceedings, 15th International Cocoa Research Conference, 2006. pp. 1259-1273.

467. Amoah, F. M.; joint author (2007). Appraisal of some methods of weed control during initial establishment of cocoa in a semi-deciduous forest zone of Ghana, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. Ghana Journal of Agricultural Science 40: 67-72.

468. Amoah, F. M.; joint author (2007). Determination of optimum age for transplanting cashew (Anacardium occidentale) seedlings in north-ern Ghana, by K. Opoku-Ameyaw, F. M. Amoah, F. K.; Op-pong and V. Agene. African Journal of Agricultural Research 2: 296-299.

469. Amoah, F. M.; joint author (2007). Drying process and Ghanaian green coffee quality. 1. Crude protein, pH and caffeine levels, by S. T. Lowor, F. M. Amoah and K. Opoku-Ameyaw. African Journal of Agricultural Research 2: 698-699.

470. Amoah, F. M.; joint author (2007). Evaluation of some organic matter re-cycling methods on soil fertility improvement and cocoa productiv-ity, by K. Ofori-Frimpong, A. A. Afrifa, F. M. Amoah and M. R. Appiah. In: Proceedings, 15th International Cocoa Research Con-ference, San Jose, Costa Rica. 2006. pp. 405-411.

471. Amoah, F. M.; joint author (2007). Locational and maturity effects on cashew tree gum production in Ghana, by E. Gyedu-Akoto, I. Oduro, F. M. Amoah, J. H. Oldham, W. O. Ellis, K. Opoku-Ameyaw and R. B. Hakeem. Scientific Research and Essay 2(11): 499-501.

472. Amoah, F. M.; joint author (2007). Participatory video: A tool for effec-tive dissemination of improved agronomic technologies among co-coa farmers in Ghana, by A. Y. Akrofi, I. O. O. Ansah, J. E. Sarfo, F. M. Amoah, N. Nathaniels, K. Holmes, I. Gyamfi, M. Adu-Kumi, and E. Cabbah. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica. 2006. pp. 1737-1742.

473. Amoah, F. M.; joint author (2007). Rheological properties of aqueous cashew tree gum solutions, by E. Gyedu-Akoto, I. Oduro, F. M.

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Amoah, J. H. Oldham, W. O. Ellis and K. Opoku-Ameyaw. Sci-entific Research and Essay 2(10): 458-461.

474. Amoah, F. M.; joint author (2008). Quality estimation of cashew gum in the production of chocolate pebbles, by E. Gyedu-Akoto, I. Oduro, F. M. Amoah, J. H. Oldham, W. O. Ellis, K. Opoku-Ameyaw, F. Asante and S. Bediako. African Journal of Food Sci-ence 2(2): 16-20.

475. Amoah, F. M.; joint author (2008). Physico-chemical properties of cashew tree gum, by E. Gyedu-Akoto, I. Oduro, F. M. Amoah, J. H. Ellis, W. O. Oldham, K. Opoku-Ameyaw and R. B. Hakeem. African Journal of Food Science 2(5): 60-64.

476. Amoah, F. M.; joint author (In press). Effect of drying pre-treatment and drying density on Ghanaian Robusta green coffee quality, by S. T. Lowor, F. M. Amoah and O. Mensah. Journal of the Ghana Sci-ence Association.

477. Amoah, F. M.; joint author (In press). Effect of the stage of ripening and frequency of harvesting on the quality of Robusta coffee in Ghana, by K. Osei-Bonsu, F. M. Amoah and F. K. Oppong. Paper pre-sented at the 18th Biennial Conference of the Ghana Science Asso-ciation. 1993, Legon, Accra, Ghana.

478. Amoah, F. M.; joint author (In Press). Managing weeds in coffee and co-coa plantations, by F. K. Oppong, K. Opoku-Ameyaw, K. Osei-Bonsu and F. M. Amoah. Journal of the Ghana Science Associ-ation

479. Amoah, F. M.; joint author (In press). Some physiological, environmental and technical factors influencing the vegetative propagation of the sheanut (Vitellaria paradoxa Gaernt) tree. Paper presented at the 24th Biennial Ghana Science Association Conference (2005) at the Errata Hotel, Accra, by J. Yeboah and F. M. Amoah.

480. Amonoo, R. S. (1985). Cultivation of coffee in a marginal area in Ghana. In: Proceedings of the 11th International Scientific Colloquium on Coffee, 1985, Lome, Togo. Paris, ASIC. pp. 599-600.

481. Amonoo, R. S.; joint author (1981). Cocoa pod husk as source of potas-sium fertilizer, by Y. Ahenkorah, B. J. Halm and R. S. Amonoo. Turrialba 31: 287-292.

482. Amonoo, R. S.; joint author (1990). Improvement of cocoa seedling es-tablishment: response to water stress with soil conditioners, by E. B. Frimpong, A. O. Dwapanyin, R. S. Amonoo, J. N. Boafo and S. Akuoko. In: Proceedings of the 1st International Confer-ence on Tree Crops, 1990, Owerri, Nigeria. pp. 20-23.

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483. Amonoo, R. S. joint author (1993). Breeding efforts to improve coffee production in Ghana, by Y. Adu-Ampomah, V. A. Martinson, E. Dasi and R. S. Amonoo. In: Proceedings of the 15th International Scientific Colloquium on Coffee, 1993, Montpellier, France. Paris, ASIC. pp.253-261.

484. Amonoo, R. S.; joint author (1994). Effects of soil mulches and anti-tran-spirant on the control of moisture stress in cocoa seedlings in a marginal area, by E. B. Frimpong, A. D. Oppong, S. Akuoku and R. S. Amonoo. In: Proceedings, 11th International Cocoa Re-search Conference, Yamoussoukro, Republique de Côte d’Ivoire, 1993. pp. 833-835.

485. Amonoo, R. S. joint author (1999). The response of some cocoa hybrids to density and pruning, by K. Osei-Bonsu, F. M. Amoah, F. K. Oppong and R. S. Amonoo. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 361-366.

486. Ampofo, S.T. (1975). How to grow better cocoa. An extension manual for cocoa extension workers. Tafo, Cocoa Research Institute of Ghana.

487. Ampofo, S.T. (1975). Studies of the physiology of seedling growth in some Acer species. Ph.D. Thesis, University of Wales, Bangor, U.K. 148p.

488. Ampofo, S. T. (1987). A review of herbicide research at Cocoa Research Institute of Ghana (CRIG). Cocoa Research Institute of Ghana. Technical Bulletin, No.12. 15p.

489. Ampofo, S. T. (1997). The current cocoa swollen shoot virus disease situ-ation in Ghana. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp.175-178.

490. Ampofo, S. T.; Bonaparte, E. E. N. A. (1981). Flushing, flowering and pod-setting of hybrid cocoa in a cocoa shade/spacing/cultivar ex-periment. In: Proceedings, 7th International Cocoa Research Con-ference, Douala, Cameroun, 1979. pp. 103-108.

491. Ampofo, S. T.; Osei-Bonsu, K. (1986). Evaluation of herbicides for use in coffee plantations. Paper presented at the Ghana Weed Science Association Conference, 1986, Accra, Ghana.

492. Ampofo, S. T.; Osei-Bonsu, K. (1988). A practical guide for coffee ex-tension workers. Tafo, Cocoa Research Institute of Ghana. 24p.

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494. Ampofo, S. T.; Osei-Bonsu, K. (1994). Effect of spacing and pruning on the initial establishment and yield of four cocoa varieties at the Co-coa Research Institute. In: Proceedings, 11th International Cocoa Research Conference, Yamoussoukro, Republique de Cote d’Ivoire, 1993. pp. 687-690.

495. Ampofo, S. T.; joint author (1977). The cocoa microclimate, by E. E. N. A. Bonaparte and S. T. Ampofo. In: Proceedings, 5th Interna-tional Cocoa Research Conference, Ibadan, Nigeria, 1975. pp. 210-216.

496. Ampofo, S. T.; joint author (1980). The agrometeorology of the cocoa tree, by E. E. N. A. Bonaparte and S. T. Ampofo. Paper pre-sented at the National Symposium on Technical and Structural Problems of Agrometeorology, organised by the Meteorological De-partment and the Ministry of Agriculture, 16-18 September, 1980, Accra, Ghana, Cocoa Research Institute, Tafo, Ghana. 16p. Mimeo-graphed.

497. Ampofo, S. T.; joint author (1989). Coffee seed germination. II The ef-fects of some pre-treatments on coffee (Coffea canephora) seed germination, by K. Osei-Bonsu, S. T. Ampofo, F. M. Amoah. Café, Cacao, Thé 33: 223-228.

498. Ampofo, S.T.; joint author (1990). Observations on cocoa flushing in Ghana under different shade regimes, with particular reference to the distribution of natural light, by D. Adomako, E. B. Frimpong, S. T. Ampofo and K. M. Brew. Planter 66: 565-579.

499. Ampofo, S.T.; joint author (1995). Appraisal of methods for the eradica-tion of CSSV infected cocoa trees, by K. Osei-Bonsu, S. T. Am-pofo, F. K. Oppong and F. M. Amoah. In: Proceedings of 1st In-ternational Cocoa Pests and Diseases Seminar, Accra, 1995. pp. 213-217.

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502. Amponsah, J. D. (1967). Inheritance of resistance of cacao to witches’ broom disease and factors influencing host parasite relationship. M. Sc. Thesis in Agriculture, University of the West Indies, St. Au-gustine, Trinidad and Tobago.

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504. Amponsah, J. D. (1971). Evaluation of resistance to Phytophthora palmivora (Butl.) Butl. in F1 generations of selected clones of Theo-broma cacao L. In: Première reunion du S/Group de Travail Afrique sur Phytophthora, Yaoundé, Cameroun, 1971.

505. Amponsah, J. D. (1977). The cropping pattern of cocoa and resistance to blackpod disease caused by Phytophthora palmivora (Butl.) Butl. In: Proceedings, 5th International Cocoa Research Conference, Ibadan, Nigeria, 1975. pp. 72-78.

506. Amponsah, J. D. (1988). Studies on field resistance of cocoa varieties to Phytophthora palmivora (Butl) Butl. infections. In: Proceedings, 10th International Cocoa Research Conference, Santo Domingo, Dominican Republic. 1987. pp. 557-567.

507. Amponsah, J. D.; Asare-Nyako, A. (1973). Glasshouse method for screening seedlings of cocoa (Theobroma cacao L.) for resistance to blackpod caused by Phytophthora palmivora (Butl.) Butl. Tropi-cal Agriculture 50: 143-152.

508. Amponsah, J. D.; Asare-Nyako, A. (1973). Screening of cocoa seedlings for resistance to Phytophthora palmivora. Cahier ORSTOM, Serie Biologie 20: 35-40.

509. Amponsah, J. D.; Asare-Nyako, A. (1975). Preliminary observations on the early field performance of inoculated and uninoculated cocoa seedlings to Phytophthora palmivora (Butl.) Butl. Paper presented at the 3rd meeting of the African Sub-Group of Workers on Phytoph-thora, Accra, Ghana, 19-23 May 1975.

510. Amponsah, J. D.; Dakwa, J. T. (1969). Preliminary genetic assessment of a black-pod resistance trial in Ghana. In: Memorias da Segunda Conferencia Internacional de Pesquisas em cacau [Proceedings of the 2nd International Cocoa Research Conference], Salvador, Bahia, Brazil, 1967. pp. 162-165.

511. Amponsah, J. D.; joint author (1972). Nursery diseases of cocoa in Ghana: 1, Pre- and post-emergence deaths of seedlings caused by Phytophthora palmivora, by A. Asare-Nyako, J. D. Amponsah,

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and E. A. Nuamah. Ghana Journal of Agricultural Science 5: 127-133.

512. Amponsah, J. D.; joint author (1973). Indications of heritability of resis-tance of a cocoa cultivar to Phytophthora palmivora pod rot in Ghana, by A. Asare-Nyako and J. D. Amponsah. Cahier ORSTOM, Serie Biologie 20: 47-50.

513. Amponsah, J. D.; joint author (1973). Reaction of cocoa seedlings to ar-tificial inoculation with Phytophthora palmivora, by A. Asare-Nyako and J. D. Amponsah. Cahier ORSTOM, Serie Biologie 20: 21-23.

514. Amponsah, J. D.; joint author (1987). Summary of inovations/recom-mended technologies for cocoa and coffee production, by D. Ado-mako, B. J. Halm and J. D. Amponsah. Tafo, Cocoa Research In-stitute of Ghana. 16p.

515. Amponsah, J. D.; joint author (1994). The separation and detection of mild strains of cocoa swollen shoot virus, by L. A. A. Ollennu, J. d’A. Hughes, G. K. Owusu and J. D. Amponsah. In: Proceed-ings, 11th International Cocoa Research Conference, Yamous-soukro, Republique de Côte d'lvoire. 1993. pp. 261-267.

516. Amponsah, J. D.; joint author (1995). Summary of innovations/recom-mended technologies for cocoa and coffee production and current research activities, by D. Adomako, B. J. Halm and J. D. Am-ponsah. Revised edition. Tafo, Cocoa Research Institute of Ghana. 30p.

517. Amponsah, J. D.; joint author (1996). The blackpod resistance breeding programme in Ghana, by A. Abdul-Karimu, Y, Adu-Ampomah, J. D. Amponsah and I. Y. Opoku. In: Proceedings of Ingenic Workshop on the Contribution of Disease Resistance to Cocoa Vari-ety Improvement. 1996, Salvador, Bahia, Brazil. pp. 149-158.

518. Amponsah, J. D. joint author (1997). Aspects of cocoa germplasm con-servation in Ghana, by Y. Adu-Ampomah, J. D. Amponsah and A. Abdul-Karimu. In: Proceedings of the 1st Ghana National Bio-diversity and Plant Genetic Resources Workshop, 1994, Koforidua, Ghana. pp. 115-120.

519. Amponsah, J. D. joint author (1997). Breeding for resistance to blackpod disease of cocoa caused by Pyhtophthora palmivora in Ghana), by

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Y. Adu-Ampomah, J. D. Amponsah and A. Abdul-Karimu. (1997) In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 127-131.

520. Anchirinah, V. M.; joint author (2005). Garden production systems and food security in Ghana: Characteristics of traditional knowledge and management systems, by E. K. Yiridoe and V. M. Anchirinah. Renewable Agriculture and Food Systems 20: 168-180.

521. Anchirinah, V. M.; joint author (2006). Home garden systems in Ghana and their contribution to germplasm flows, by S. O. Bennett-Lartey, G. S. Ayernor, Carol Markwei, I. K. Asante, D. K. Abbiw, S. K. Boateng, V. M. Anchirinah, P. Ekpe, G.T. Odamten, R. Vodouhe and P. B. Eyzaguire. Plant Gene-tic Resources Newsletter 146: 33-38.

522. Aneani, F. (2001). Cocoa producer price policy and welfare of cocoa farmers in Ghana. Paper presented at the International Conference on Managing Tropical Soils for Sustainable Agricultural Productiv-ity, Soil Science Society of Ghana, SARI, Tamale, Ghana, 2001.

523. Aneani, F.; Asamoah, M. (2004). Socio-economic survey on cocoa fer-mentation. Journal of the Ghana Science Association 6(2): 90-97.

524. Aneani, F.; Takrama, J. F. (2007). Practices that influence quality of co-coa in Ghana: Perceptions of cocoa farmers. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1381-1387.

525. Aneani, F.; joint author (2002). Report on a baseline survey to determine and compare farmer perceptions of cocoa blackpod disease in P. megakarya and non-P. megakarya endemic areas, by E. G. As-ante, F. Aneani, M. Asamoah and F. Baah. New Tafo, Ghana, CRIG.

526. Aneani, F.; joint author (2003). Screening of neem extracts for the con-trol of cocoa capsids (Heteroptera: Miridae), by B. Padi, R. Adu-Acheampong, M. Asamoah, F. Aneani, F. Baah, M. K. Tamakloe. In: Proceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, 2003, Accra, Ghana. pp. 44-52.

527. Aneani, F.; joint author (2005). Preliminary studies of the control of co-coa swollen shoot disease by the use of immune crops as barriers, by L. A. A. Ollennu, K. Osei-Bonsu, F. Aneani, K. Acheam-pong. In: Proceedings, 14th International Cocoa Research Confer-

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ence, Accra, Ghana,. 2003. Cocoa Producers’ Alliance. pp. 839 – 843.

528. Aneani, F.; joint author (2007). Management of blackpod disease of co-coa with reduced number of fungicide application and crop sanita-tion, by I. Y. Opoku, M. K. K. Assuah and F. Aneani. African Journal of Agricultural Research 2(11): 601-604.

529. Anim-Kwapong, Esther. (1993) Translocation breakpoint localisation in barley, Hordeum vulgare L., using morphological markers and N-Banding pattern. M. Phil. Thesis, Genetics, University of Birming-ham, U.K. 40p.

530. Anim-Kwapong, Esther. (1994). Pollen-pistil interactions in Theobroma cacao L. (Sterculiaceae). M. Phil Thesis, University of Reading, U.K. 116p.

531. Anim-Kwapong, Esther; Adu-Ampomah, Y. (1997). Improvement in the performance of Arabusta coffee in Ghana. In: Proceedings of the 17th International Scientific Colloquium on Coffee, Nairobi, Kenya, 1997. Paris, ASIC. pp. 514-519.

532. Anim-Kwapong, Esther; Adu-Ampomah, Y. (2001). Robusta coffee im-provement in Ghana - achievements and prospects. In: Proceed-ings of the 19th International Scientific Colloquium on Coffee, Tri-este, Italy, 2001. [8p.] (On compact disc).

533. Anim-Kwapong, Esther; Adu-Ampomah, Y. (2004). Agronomic charac-teristics of drought tolerant Robusta coffee genotypes. In: Proceed-ings of the 20th International Scientific Colloquium on Coffee, Ban-galore, India, 2004. Paris, ASIC. pp.1081-1084

534. Anim-Kwapong, Esther; Appiah, M. R.; Osei-Bonsu, K. (2006). Cocoa fermentation: the role of covering and aeration on bean quality. Journal of the Ghana Science Association 8(1): 97-104.

535. Anim-Kwapong, Esther; Appiah, M. R.; Osei-Bonsu, K. (2007). A re-view of factors affecting the quality of processed cocoa beans in Ghana. Journal of the Ghana Science Association 9(1): 106-119.

536. Anim-Kwapong, Esther; Osei-Bonsu, K. (2004). The coffee industry of Ghana - a breeder’s perspective. In: Proceedings of the 20th Inter-national Scientific Colloquium on Coffee, Bangalore, India, 2004. Paris, ASIC. pp. 1077-1080.

537. Anim-Kwapong, Esther; joint author (1999). Nutrient status and rooting of Robusta coffee (Coffea canephora) Pierre ex Froehner cuttings from stock plants under Gliricidia sepium, by G. J. Anim-Kwa-

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pong, Esther Anim-Kwapong and F. M. Amoah. Tropical 76: 263-268.

538. Anim-Kwapong, Esther; joint author (In press). Evaluation of some Ro-busta coffee (Coffea canephora Pierre Ex A. Froehner) clones for high density planting in Ghana, by G. J. Anim-Kwapong, Esther Anim-Kwapong and F. K. Oppong. In: Proceedings of the 22nd

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539. Anim-Kwapong, Esther See also Dasi, Esther

540. Anim-Kwapong, G. J. (1994). The potential of Albizia zygia in cocoa plan-tation systems of Ghana. Ph. D. Thesis. University of Wales. U.K. 190p.

541. Anim-Kwapong, G. J. (2003). Potential of some neotropical Albizia species as shade trees when replanting cacao in Ghana. Agro-forestry Systems 58: 185-193.

542. Anim-Kwapong, G. J. (2006). Nitrogen value of pruning residues of some neotropical Albizia species with potential as shade for cacao. Tropi-cal Science 46: 46-49.

543. Anim-Kwapong, G. J.; Abdul-Karimu, A.; Oppong, F. K. (2005). Effect of pre-treatment and genotype of kola (Cola nitida (Vent) Schott and Endlicher) nuts on germination, growth and early yield. Tropi-cal Agriculture 82: 105-111.

544. Anim-Kwapong, G. J.; Anim-Kwapong, Esther; Amoah, F. M. (1999). Nutrient status and rooting of Robusta coffee (Coffea canephora Pierre ex Froehner) cuttings from stock plants under Gliricidia sepium. Tropical Agriculture 76: 263-268.

545. Anim-Kwapong, G. J.; Anim-Kwapong, Esther; Oppong, F. K. (In press). Evaluation of some Robusta coffee (Coffea canephora Pierre Ex A. Froehner) clones for high density planting in Ghana. In: Proceedings of the 22nd International Scientific Colloquium on Cof-fee, Campinas, SP-Brazil, 14-19th September 2008.

546. Anim-Kwapong, G. J.; Frimpong, E. B. (2006). Vulnerability and adapt-ation assessment under the Netherlands Climate Change Assist-ance Programme. Phase 2 (NCAP2): Vulnerability of agriculture to climate change – impact of climate on cocoa production. Final re-port submitted to Environmental Protection Agency, Ghana. 122p.

547. Anim-Kwapong, G. J.; Osei-Bonsu, K. (2005). Conserving globally sig-nificant biodiversity in cocoa production landscape: Cocoa produc-

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tion assessment. Final report submitted to Conservation Interna-tional – Ghana. 39p.

548. Anim-Kwapong, G. J.; Osei-Bonsu, K. (2005). Nitrogen fixing potential of Flemingia macrophylla when planted as temporary shade for ca-cao. Tropical Science 45: 36-40.

549. Anim-Kwapong, G. J.; Teklehaimanot, Z. (1995). Reclamation of de-graded cocoa lands using Albizia zygia (DC) Macbride. Land De-gradation and Rehabilitation 6(2): 109-123.

550. Anim-Kwapong, G. J.; Teklehaimanot, Z. (1996). The potential roles of Albizia zygia (DC) Macbride in cocoa plantation systems. In: Pro-ceedings of the International Workshop on Albizia and Paraserian-thes species, Bislig, Mindanao, Philipines, 1994. pp. 98-106.

551. Anim-Kwapong, G. J.; Teklehaimanot, Z. (2001). Albizia zygia (DC) Macbride, a shade tree for cocoa. The effects of duration of acid scarification and substrate on germination of seeds. Forests, Trees and Livelihoods 11: 47-55.

552. Anim-Kwapong, G. J.; joint author (1996). The potential of Albizia zygia (DC) Macbride for soil amelioration, by Z. Teklehaimanot and G. J. Anim-Kwapong. Plant and Soil Ecology 3: 59-68.

553. Anim-Kwapong, G. J.; joint author (1996). Tolerance of Albizia zygia (DC) Macbride, a shade tree for cocoa, to soil acidity and water stresses, by Z. Teklehaimanot and G. J. Anim-Kwapong. Journal of the Science of Food and Agriculture 70: 389-395.

554. Anim-Kwapong, G. J.; joint author (1998). Albizia and Paraserianthes in-tercropping systems, by N. J. Daniel, J. M. Roshetko, T. Iosefa, G. J. Anim-Kwapong, K. Okunomo and A. P. Y Djogo. In: Albizia and Paraserianthes production and use: a field manual. Arkansas, Win-rock International pp.18-22

555. Anim-Kwapong, G. J.; joint author (1998). Albizia and Paraserianthes production: botany and ecology, by J. Arche, J. G. Anim-Kwapong, and T. Iosefa. In: Albizia and Paraserianthes production and use: a field manual. Arkansas, Winrock International. pp. 1-3.

556. Anim-Kwapong, G. J.; joint author (1998). Preliminary evaluation of some forest trees for cocoa cultivation, by K. Osei-Bonsu and G. J. Anim-Kwapong. Journal of the Ghana Science Association 1(1): 141-150.

557. Anim-Kwapong, G. J.; joint author (2000). Evaluation of some legumi-nous species for the establishment of Robusta coffee in Ghana, by K. Osei-Bonsu, G. J. Anim-Kwapong and F. M. Amoah. In: Pro-

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ceedings of the 18th International Scientific Colloquium on Coffee, 1999, Helsinki, Finland. Paris, ASIC. pp. 438-440.

558. Anim-Kwapong, G. J.; joint author (2003). Kola germplasm collection and conservation at the Cocoa Research Institute of Ghana, by A. Abdul-Karimu, K. Osei-Bonsu, Y. Adu-Ampomah, F. M. Amoah, G. J. Anim-Kwapong, J. F. Takrama, J. E. Sarfo and K. Acheampong. Journal of the Ghana Science Association 6(1): 139-146.

559. Anim-Kwapong, G. J.; joint author (2004). State of the art and delivery of technologies in the Ghana cocoa industry, by K.; Osei-Bonsu and G. J. Anim-Kwapong. In: Proceedings of Workshop on the mechanisms for the transfer of technologies to economic operators in the alliance countries, Ilheus, Brazil, 11-14 July 2004.

560. Anim-Kwapong, G. J.; joint author (2005). Mechanisms for the transfer of technology to economic operators in the cocoa industry in Ghana, by K. Osei-Bonsu and G. J. Anim-Kwapong. Paper pre-sented at a workshop of the Cocoa Producers’ Alliance (COPAL) 11th – 14th July 2005, Kuala Lumpur, Malaysia.

561. Appiah, A.A.; Opoku, I. Y.; Akrofi, A. Y. (2004). Natural occurrence and distribution of stem cankers caused by Phytophthora megakarya and Phytophthora palmivora on cocoa. European Jour-nal of Plant Pathology 110: 983–990.

562. Appiah, A. A.; Owusu, G. K. (1997). Cocoa mistletoes: a review. In: Pro-ceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 272-279.

563. Appiah, A. A.; joint author (1997.). On-farm farmer-managed fungicide trials to control blackpod disease caused by Phytophthora megakarya in Ghana, by A. Y. Akrofi, I. Y. Opoku and A. A. Ap-piah. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp.109-118.

564. Appiah, A. A.; joint author (1997). The spread of Phytophthora megakarya on cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 98-107.

565. Appiah, A. A.; joint author (1998). Trunk injection of potassium pospho-nate for the control of black pod disease of cocoa, by I. Y. Opoku, A. Y. Akrofi, A. A. Appiah and M. C. Luterbacher. Tropical Sci-ence 38: 179-185.

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566. Appiah, A. A.; joint author (1999). Phytophthora species differentiation by analysis of randomly amplified polymorphic DNAs, by S. T. Sackey, A. Y. Akrofi, A. A. Appiah and I. Y. Opoku. In: Pro-ceedings, 12th International Cocoa Research Conference, Sal-vador, Bahia, Brazil, 1996. pp. 107-112.

567. Appiah, A. A.; joint author (1999). The occurrence and distribution of Phytophthora canker on cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. In: Proceedings, 12th International Co-coa Research Conference, Salvador, Bahia, Brazil, 1996. pp.113-119.

568. Appiah, A. A.; joint author (1999). The spread of Phytophthora megakarya on cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. Journal of the Ghana Science Association 2: 110-116.

569. Appiah, A. A.; joint author (2000). Phytophthora megakarya: A potential threat to the cocoa industry in Ghana, by I. Y. Opoku, A. A. Ap-piah, A. Y. Akrofi and G. K. Owusu. Ghana Journal of Agricul-tural Science 33: 237-248.

570. Appiah, A. A.; joint author (2003). Management of Phytophthora pod rot disease on cocoa farms in Ghana, by A. Y. Akrofi, A. A. Appiah and I. Y Opoku, Crop Protection 22, 469-477.

571. Appiah, M. R. (1975). Note on the determination of organic phosphorus in some cocoa cultivated soils of Ghana. Ghana Journal of Agricul-tural Science 8: 159-162.

572. Appiah, M. R. (1975). Organic phosphorus and phosphatase activity in cocoa soils of Ghana. Ghana Journal of Agricultural Science 8: 45-50.

573. Appiah, M. R. (1979). Phosphatase activity of soils and its relationship to mineralization of inositol phosphates. Ph. D. Thesis, Soil Science, University of Guelph, Canada. 121p.

574. Appiah, M. R. (1990). CRIG's experience in off-station fertilizer trials. In: Proceedings of the1st Farming Systems Workshop, 1990. Tafo, CRIG, Ghana. pp. 69-76.

575. Appiah, M. R. (1992). Rehabilitation of degraded cocoa soils of Ghana using agroforestry techniques. In: Proceedings of the12th/13th An-nual General Meeting of the Soil Science Society of Ghana. pp. 13-16.

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576. Appiah, M. R. (204). Impact of Cocoa Research Innovations on poverty alleviation in Ghana. Tafo: CRIG. 32p.

577. Appiah, M.R. (2005). The role of research in Ghana’s cocoa industry. In: Ghana Science Association 24th Biennial Conference. Plenary pre-sentations 1st -4th August, 2005. pp. 42-55.

578. Appiah, M. R.; Ahenkorah, Y. (1988). Effects of successive air-drying and rewetting cycles on the inositol phosphate content and phos-phatase activity of soils. In: Proceedings of the11th Annual General Meeting of the Soil Science Society of Ghana. pp.63-66.

579. Appiah, M. R.; Ahenkorah, Y. (1989). Arylsulphatase activity of differ-ent latosol soils of Ghana cropped to cocoa (Theobroma cacao L.) and coffee (Canephora var Robusta). Biology and Fertility of Soils 7: 186-190.

580. Appiah, M. R.; Ahenkorah, Y. (1989). Determination and available sul-fate in some soils of Ghana using five extraction methods. Biology and Fertility of Soils 8: 80-86.

581. Appiah, M. R.; Halm, B. J. (1994). The distribution of sulfate adsorbing capacities and arylsulphatase activity in some profiles of cocoa soils of Ghana. In: Proceedings, 11th International Cocoa Research Conference, Yamoussoukro, Republique de Côte d’Ivoire, 1993. pp. 691-699.

582. Appiah, M. R.; Halm, B. J.; Ahenkorah, Y. (1985). Phosphatase activity of soils as affected by cocoa pod ash. Soil Biology and Biochem-istry 17: 823-826.

583. Appiah, M. R.; Ofori-Frimpong, K.; Afrifa, A. A.; Asante, E.G. (1999). Prospects of fertilizer use in the cocoa industry in Ghana. In: Efficient soil and water management: A prerequisite for sustain-able agriculture. Proceedings of the 14th/15th Annual General Meet-ings of the Soil Science Society of Ghana, Accra, Ghana, 1997. pp. 215-221.

584. Appiah, M. R.; Ofori-Frimpong, K.; Afrifa, A. A.; Asante, E. G.; Opoku-Ameyaw, K.; Danquah, J. B. (2000). Sustainable cocoa production in Ghana through soil fertility management: Margaret Opferkuch Award for Best Innovation in the Cocoa Industry in Ghana for the year 2000. 27p.

585. Appiah, M. R.; Ofori-Frimpong, K.; Afrifa, A. A.; Opoku-Ameyaw, K. (2006). Sustainable cocoa production in Ghana through soil fertility management. In: Proceedings of the International Conference on Managing Soil Resources of the Tropics for Sustainable Agricultural

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Productivity and Annual General Meeting of the Soil Science Soci-ety of Ghana, 17/18: 121-129.

586. Appiah, M. R.; Ofori-Frimpong, K.; Ahenkorah, Y. (1990). Note on the effect of cocoa pod ash on some forms of soil potassium in Ghana. Planter 66: 227-232.

587. Appiah, M. R.; Sackey, S. T.; Ofori-Frimpong, K.; Afrifa, A. A. (1997). The consequences of cocoa production on soil fertility in Ghana: a review. Ghana Journal of Agricultural Science 30: 183-190.

588. Appiah, M. R.; Thomas, R. L. (1982). Inositol phosphate and organic phosphorus contents and phosphatase activity of some Canadian and Ghanaian soils. Canadian Journal of Soil Science 62: 31-30.

589. Appiah, M. R.; Thompson, E. J. (1974). The effect of successive cropping on soil organic phosphorus. Ghana Journal of Agricultural Science 7: 25-30.

590. Appiah, M. R.; joint author (1982). Fertilizer use on cacao rehabilitation projects in Ghana, by Y. Ahenkorah, B. J. Halm, M. R. Appiah and G. S. Akrofi. In: Proceedings, 8th International Cocoa Re-search Conference, 1981, Cartagena, Colombia. pp. 165-170.

591. Appiah, M. R.; joint author (1982). Inositol penta – and hexa-phosphate content of some cocoa soils in Ghana, by B. J. Halm, Y. Ahenkorah and M. R. Appiah. Zeits. pflanzen. Bodenk. 145: 586-592

592. Appiah, M. R.; joint author (1987). Review of foliar fertilization of some tropical perennial crops and effect of three foliar fertilisers on co-coa nursery seedlings, by Y. Ahenkorah, M. R. Appiah and B. J. Halm. Planter 63: 3-15

593. Appiah, M. R.; joint author (1987) Twenty years' results from a shade and fertilizer trial on Amazon cocoa (Theobroma cacao L.) in Ghana, by Y. Ahenkorah, B. J. Halm, M. R. Appiah, G. S. Akrofi and J. E. K. Yirenkyi. Experimental Agriculture 23: 31-39.

594. Appiah, M. R.; joint author (1988). Production and utilisation of cocoa pod husk as source of potash fertiliser, by Y. Ahenkorah, M. R. Appiah, B. J. Halm and R. E. Dodoo. In: Proceedings of the10th In-ternational Cocoa Research Conference, Santo Domingo, Domin-ican Republic. 1987. pp. 843-848.

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595. Appiah, M. R.; joint author. (1990). Production and utilisation of cocoa pod husk as source of potash fertilizer, by Y. Ahenkorah, M. R. Appiah, B. J. Halm and R. E. Dodoo. In: Proceedings of the 11th

Annual General Meeting of the Soil Science Society of Ghana, 1988. pp. 77-87.

596. Appiah, M. R.; joint author (1992). Modal characteristics of soils within the Cocobod plantations of Ghana, by Y. Ahenkorah and M. R. Appiah. In: Soil Resource Management Towards Sustainable Agri-culture in Ghana: The Role of the Soil Scientist. Proceedings of the 12th and 13th Annual General Meetings of the Soil Science Society of Ghana. pp. 25-32.

597. Appiah, M. R.; joint author (1996). Promoting food security through soil fertility management in food and non-food crops, by Y. Ahenko-rah and M. R. Appiah. In: Proceedings of the National Workshop on Soil Fertility Management Action Plan for Ghana, held at Cape Coast, Ghana, 2nd to 5th July, 1996. pp. 61-75.

598. Appiah, M. R.; joint author (1996). Shea (Vitellaria paradoxa) intercrop-ping systems in northern Ghana: effect of cultural practices and crop combinations on the performance of shea seedlings, by K. Osei-Bonsu, M. R. Appiah, F. M. Amoah and F. K. Oppong. Ghana Journal of Agricultural Science 29: 3-8.

599. Appiah, M. R.; joint author (1997). Effect of phosphorus fertilizer applica-tion on some forms of phosphorus in selected Ghanaian cocoa-growing soils, by K. Ofori-Frimpong, D. L Powell and M. R. Ap-piah. Ghana Journal of Agricultural Science 30: 23-29.

600. Appiah, M. R.; joint author (1999). Distribution of free and total alu-minium in some cocoa-growing soils of Ghana, by K. Ofori-Frim-pong, G. K. Asamoah and M. R. Appiah. Ghana Journal of Agri-cultural Science 32: 101-107.

601. Appiah, M. R.; joint author (1999). Economic evaluation of shea (Vitel-laria paradoxa) food intercropping systems in northern Ghana, by K. Osei-Bonsu, E. G. Asante, M. R. Appiah, F. M. Amoah and F. K. Oppong. Journal of the Ghana Science Association (Special edition) 2(3): 70-80.

602. Appiah, M. R.; joint author (1999). The effects of cocoa leaf litter and P fertilizer on the transformation of P in cocoa growing soils of Ghana, by K. Ofori-Frimpong, D. L. Rowell, M. R. Appiah and B. J. Halm. In: Efficient Soils and Water Management: a Prerequi-site for Sustainable Agriculture. Proceedings of the 14th and 15th Annual General Meeting of the Soil Science Society of Ghana, 1997, Accra, Ghana. pp. 43-49.

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603. Appiah, M. R.; joint author (1999). The response of cocoa yield to fertil-izer application under different farm maintenance practices, by K. Opoku-Ameyaw, M. R. Appiah, K. Ofori-Frimpong and A. A. Afrifa. In: Managing Soils for Sustainable Production of Food and Industrial Crops: Proceedings of the16th Annual General Meeting of the Soil Science Society of Ghana. pp. 105-112.

604. Appiah, M. R.; joint author (2000). Improving the growth of cashew (Anacardium occidentale) seedlings interplanted into mature sheanut stands in northern Ghana, by K. Opoku-Ameyaw and M. R. Appiah. Ghana Journal of Agricultural Science33: 159-164.

605. Appiah, M. R.; joint author (2001). Microbial biomass and extractable N and P contents of soils under different weed control methods in co-coa plantation. Paper presented at the 17th Annual General Meet-ing of the Soil Science Society of Ghana, Tamale, Ghana, 26th Feb-ruary-2nd March 2001, by K. Ofori-Frimpong, M. R. Appiah, A. A. Afrifa and F. K. Oppong.

606. Appiah, M. R.; joint author (2001). Screening of some leguminous plants for soil fertility improvement and weed management during cocoa establishment, by K. Ofori-Frimpong, F. K. Oppong, M. R. Ap-piah and A. A. Afrifa. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Malaysia, 2000. pp. 1277-1286.

607. Appiah, M. R.; joint author (2002). A comparative study on the agro-nomic effectiveness of phosphate rock on seven varieties of cocoa seedlings, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, M. R. Appiah and K. Ofori- Frimpong. Ghana Journal of Agricultural Science (In press)

608. Appiah, M. R.; joint author (2002). Alleviating rural poverty through fer-tilty management of cocoa soils in Ghana – A case study, by K. Ofori-Frimpong, M. R. Appiah and A. A. Afrifa. In: Managing Soils for Sustainable Production of Food and Industrial Crops: Pro-ceedings of the 16th Annual General Meeting of the Soil Science So-ciety of Ghana, 1999. 16:133-137.

609. Appiah, M. R.; joint author (2002). Growth and nutrient uptake of some cocoa varieties grown in contrasting soils, by K. Ofori-Frimpong, A. A. Afrifa and M.R. Appiah. Ghana Journal of Agricultural Sci-ence 35: 41–48.

610. Appiah, M. R.; joint author (2002). Shade trees are alternative hosts of the cocoa pathogen, Phytophthora megakarya, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah. Crop Protection 21: 629-634.

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611. Appiah, M. R.; joint author (2002.) The movement and persistence of tri-clopyr (Garlon 2) in some Ghanaian cocoa growing soils, by F. K. Oppong, M. R. Appiah, K. Osei-Bonsu and F. M. Amoah. In: Managing Soils for Sustainable Production of Food and Industrial Crops: Proceedings of the 16th Annual General Meeting of the Soil Science Society of Ghana, 1999. pp. 49-56.

612. Appiah, M. R.; joint author (2003). Effects of mulching on soil nutrients and yield of Robusta coffee, by A. A. Afrifa, K. Ofori-Frimpong, M. R. Appiah and B. J. Halm, Tropical Agriculture 80: 105–109.

613. Appiah, M. R.; joint author (2003). Using 32 P soil injection technique in the root activity studies of Gliricidia sepium, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, M. R. Appiah and K. Ofori- Frim-pong. Journal of the Ghana Science Association 5(1): 45–52.

614. Appiah, M. R.; joint author (2004). the use of fertilizer and fungicide to sustain cocoa production in severe blackpod areas, by I. Y. Opoku, K. Ofori-Frimpong, M. R. Appiah. Tropical Science 44: 95-99.

615. Appiah, M. R.; joint author (2005). Cocoa/Coconut intercropping trial in Ghana: Effect of the cropping systems on soil nutrient dynamics, by K. Ofori-Frimpong, A. A. Afrifa, K. Osei-Bonsu and M.R. Appiah. In: Proceedings, 14th International Cocoa Research Con-ference, Accra, Ghana, 2003. pp. 303-308.

616. Appiah, M. R.; joint author (2005). Effect of nitrogen rates and frequency of application on cocoa yield, soil and mineral composition of co-coa leaves, by K. Ofori-Frimpong, A. A. Afrifa and M.R. Ap-piah. In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 239-245.

617. Appiah, M. R.; joint author (2005). Use of 32 P and 15N to determine the efficiency of utilization of phosphorus and nitrogen fertilizers in co-coa seedlings, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, M. R. Appiah and K. Ofori-Frimpong. In: Proceedings, 14th In-ternational Cocoa Research Conference, Accra, Ghana, 2003. pp. 231-237.

618. Appiah, M. R.; joint author (2006). Assessment of sanitation and fungi-cide application directed at the cocoa tree trunks for the control of Phytophthora blackpod infections in pods growing in the canopy, by I. Y. Opoku, A. Y. Akrofi and A. A. Appiah European Journal of Plant Pathology 117:167-173

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619. Appiah, M. R.; joint author (2006). Cocoa fermentation: the role of cover-ing and aeration on bean quality, by Esther Anim-Kwapong, M. R. Appiah and K. Osei-Bonsu. Journal of the Ghana Science As-sociation 8: 97-104.

620. Appiah, M. R.; joint author (2006). Improving the growth of cocoa seedlings in nursery by the use of fertilizers, by K. Ofori-Frim-pong, A. A. Afrifa and M.R. Appiah. Journal of the Ghana Sci-ence Association 8: 85–91.

621. Appiah, M. R.; joint author (2007). Effect of weed control methods on some soil properties of newly planted cocoa farm, by K. Ofori-Frimpong, A. A. Afrifa, F.K Oppong and M. R. Appiah. Ghana Journal of Agricultural Science 40(2): 127-133.

622. Appiah, M. R.; joint author (2007). Evaluation of some organic matter re-cycling methods on soil fertility improvement and cocoa productiv-ity, by K. Ofori-Frimpong, A. A. Afrifa, F.M. Amoah and M.R. Appiah. In: Proceedings, 15th International Cocoa Research Con-ference, San Jose, Costa Rica, 2006. pp. 405-411.

623. Appiah, M. R.; joint author (2007). A review of factors affecting the qual-ity of processed cocoa beans in Ghana, by Esther Anim-Kwapong, M. R. Appiah and K. Osei-Bonsu. Journal of the Ghana Science Association 9(1): 106-119.

624. Appiah, M. R.; joint author (2007). Nitrogen, phosphorus and potassium budget under the cocoa ecosystem: produce harvesting phase, by A. A. Afrifa, K. Ofori-Frimpong, M. R. Appiah, S. Acquaye and D. Snoeck, In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 395-404.

625. Appiah, M. R.; joint author (2007). Responses of different cocoa varieties to different phosphorus sources, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, K. Ofori-Frimpong and M. R. Appiah, In: Pro-ceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 731-733.

626. Appiah, M. R.; joint author (2007). Soil diagnostic method for formulat-ing fertilizer requirements on cocoa plantations, by D. Snoek, M. K. Abekoe, M. R. Appiah, A. A. Afrifa, K. Ofori-Frimpong. In: Pro-ceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 387-394.

627. Appiah, M. R.; joint author (2008). Effects of fertilizer on nitrogen con-tents of berries of three coffee clones and berry infestation by the coffee berry borer, Hypothenemus hampei (Ferr.) (Coleoptera: Scolytidae), by E. A. Dwomoh, K. Ofori-Frimpong, A. A. Afrifa

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651. Asante, E. G. (1994). Study report on the provision of catalytic support by the Common Fund to developing countries in respect of produc-tion and supply management operations and in implementing di-versification programmes: A case study of cocoa production in West Africa. Submitted to the Common Fund for Commodities (CFC), Amsterdam, The Netherlands. 73p.

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653. Asante, E. G. (1997). The economic relevance of plant disease and pest management in the Ghana cocoa industry. In: Proceedings of the1st International Cocoa Pests and Diseases Seminar, 1995, Ac-cra, Ghana. pp. 288-299.

654. Asante, E. G. (1999). An empirical model for cocoa production manage-ment and price forecasting. In: Proceedings, 12th International Co-coa Research Conference, Salvador, Bahia, Brazil, 1996. pp.1117-1124.

655. Asante, E. G.; Agyente-Badu, C. K. (1993). Study report on cocoa pod husk soap makers in the Gomoah-Dawurampong area. Akim-Tafo, Cocoa Research Institute. 4p.

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657. Asante, E. G.; Aneani, F.; Asamoah, M.; Baah, F. (2002). Report on a baseline survey to determine and compare farmer perceptions of cocoa blackpod disease in P. megakarya and non-P. megakarya endemic area. New Tafo, Ghana, CRIG.

658. Asante, E. G.; joint author (1996). Pilot plants to process cocoa by-products in Ghana: Production cost analysis for various products, by D. Adomako, E. Gyedu, J. F. Takrama and E.G. Asante. Tafo, Cocoa Research Institute. 28p.

659. Asante, E. G.; joint author (1998). Utilization of cocoa by-products for nu-trition, body care and food supply. Paper presented at the 9th Meeting of the Advisory Group on the World Cocoa Economy, 25-30 May, 1998, Valencia, Spain, organised by The International Co-coa Organisation, London, U.K., by D. Adomako, E. Osei-Aman-ing, C. K. Agyente-Badu, E.G. Asante, Esther Gyedu, Helena Oppong and J. Takrama. London, ICCO. 13p.

660. Asante, E. G.; joint author (1999). Compound animal feeds based on co-coa pod husk, by D. Adomako, E. Osei-Amaning and E. G. As-ante. Tropical Science 39: 120-123.

661. Asante, E. G.; joint author (1999). Economic evaluation of shea (Vitel-laria paradoxa) food intercropping systems in northern Ghana, by K. Osei-Bonsu, E. G. Asante, M. R. Appiah, F. M. Amoah and F. K. Oppong. Journal of the Ghana Science Association (Special edition) 2(3): 70-80.

662. Asante, E. G.; joint author (1999). Prospects of fertilizer use in the cocoa industry in Ghana, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa and E. G. Asante. In: Efficient soil and water management: A prerequisite for sustainable agriculture. Proceedings of the 14th & 15th Annual General Meetings of the Soil Science Ghana, Accra, Ghana, 1997. pp. 215-221.

663. Asante, E. G.; joint author (2000). Report on a survey on insecticide use and residues in cocoa beans in Ghana, by B. Padi, M. A. Abitey, E. B. Owusu, A. A. Fofie, E. Asante, J. B. Ackonor. A technical re-port on investigations requested by the Ghana Cocoa Board.

664. Asante, E. G.; joint author (2000). Sustainable cocoa production in Ghana through soil fertility management, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa, E. G. Asante, K. Opoku-Ameyaw and J. B. Danquah. : Margaret Opferkuch Award for Best Innovation in the Cocoa Industry in Ghana for the year 2000. 27p.

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DFID project R7326, Crop Protection Research Programme, by M. Holderness, K. Holmes, I. Opoku, A. Akrofi, E. G. Asante, J. N. Boafo, J. Takrama, B. King and J. Cox. 142p.

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667. Asante, E. G.; joint author (2006. Impact of breeders’ collection on cocoa plantings of Ghana: Assessment by molecular marker analysis and farmers’ field survey, by S. Y. Opoku, R. Bhattacharjee, M. Kolesnikova-Allen, L. Enu-Kwesi, E. G. Asante and Y. Adu-Am-pomah. Journal of the Ghana Science Association 8:1–2.

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669. Asante, E. G.; joint author (2007). Feeding broiler chickens with rations containing dried cocoa pod husk: A practical experience at the Co-coa Research Institute of Ghana, Tafo, by E. O. K. Oddoye, C. K. Agyente-Badu, V. Johnson and E. G. Asante. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1423-1427.

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1060. Evans, H. C. (1974) Natural control of arthropods, with special refer-ence to ants (Formicidae) by fungi in the tropical high forest of Ghana. Journal of Applied Ecology 11: 37-49.

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1073. Firempong, S. (1982) The performance of Planococcoides njalensis (Homoptera; Pseudococcidae) on some cocoa cultivars. Tests of Agrochemicals and Cultivars: 3: 100-101. (A supplement to Annals of Applied Biology 100)

1074. Firempong, S. (1983) Some aspects of biological statistics of Planococcoides njalensis Laing (Homoptera: Pseudococcidae) reared on cocoa seedlings. Revista Theobroma 13: 151-156.

1075. Firempong, S. (1984) Laboratory and field evaluation of cocoa proge-nies for resistance to mealybug vectors (Hemiptera: Pseudococci-dae) of swollen shoot virus. Bulletin of Entomological Research 74(1): 97-102.

1076. Firempong, S; Kumar, R. (1975) Natural enemies of Toxoptera auran-tii (Boy) (Homoptera; Aphididae) on cocoa in Ghana. Biological Journal of the Linnean Society 7: 261-292.

1077. Firempong, S. K. (1975) Notes on the biology of the black citrus aphid Toxoptera aurantii (Boy) on cocoa in Ghana. In: Proceedings of the 4th Conference of West African Cocoa Entomologists, Legon, Ghana. 1974. pp.146-149.

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1079. Freeman, G. H.; joint author (1963) The use of trunk growth as a cali-brating variate for field experiments on cocoa trees, by J. F. Long-worth and G. H. Freeman. Journal of Horticultural Science 38: 61-67

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1082. Frimpong, E. B.; Adu-Ampomah, Y.; Dwapanyin, A. O.; Abdul-Karimu A. (2005) Efforts to re-establish cocoa in denuded areas in Ghana. In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 317-324.

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1084. Frimpong, E. B.; Adu-Ampomah, Y.; Sarfo, J. E.; Akuoko, S. (1998) Optimising growth in relation to light regime and develop-ment of improved Robusta coffee. Journal of the Ghana Science As-sociation 1(2): 12-16.

1085. Frimpong, E. B.; Dwapanyin, A. O.; Adu-Ampomah, Y.; Abdul-Karimu, A. (2000) Prospects of using cassava as a temporary shade for cocoa in the degraded areas. Journal of the Ghana Sci-ence Association 2: 158-163.

1086. Frimpong, E. B.; Dwapanyin, A. O.; Amonoo, R. S.; Boafo, J. N.; Akuoko, S. (1990) Improvement of cocoa seedling establishment: response to water stress with soil conditioners. In: Proceedings of the 1st International Conference on Tree Crops, 1990, Owerri, Nigeria. pp. 20-23.

1087. Frimpong, E. B.; Oppong, A. D.; Akuoko, A.; Amonoo, R. S. (1994) Effects of soil mulches and anti-transpirant on the control of moisture stress in cocoa seedlings in a marginal area. In: Proceed-ings, 11th International Cocoa Research Conference, Yamous-soukro, Republique de Côte d’Ivoire, 1993. pp. 833-835.

1088. Frimpong, E. B.; Sarfo, J. E. (1991) Chemical approach towards the improvement of the agronomic performance of cocoa varieties. Café, Cacao, Thé 35: 191-195.

1089. Frimpong, E. B.; joint author (1989) The productivity of cattle raised under sheanut trees in the Bole District of the Northern Region-A preliminary report, by A. K. Tuah, E. Osei-Amaning, D. Adomako and E. B. Frimpong. In: Proceedings of the 19th Animal Science Symposium, Kumasi, Ghana. pp. 121-124.

1090. Frimpong, E. B.; joint author (1990) Observations on cocoa flushing in Ghana under different shade regimes, with particular reference

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1091. Frimpong, E. B. joint author (1990) The performance of West African shorthorn breed of cattle grazing under sheanut trees in the Bole district in the Guinea Savannah zone of Ghana, by E. Osei-Aman-ing, A. K. Tuah, D. Adomako and E. B. Frimpong. Paper pre-sented at the 1st African Small Ruminants Research Networks Con-ference, 1990, Nairobi, Kenya. pp. 35-39.

1092. Frimpong, E. B. joint author (1991) Cocoa pod-and-husk meal as a feed ingredient in layer diets, by S. A. Osei, C. C. Atuahene, D. Heathcote, E. B. Frimpong and D. Adomako. Animal Feed Sci-ence and Technology 35: 283-288.

1093. Frimpong, E. B.; joint author (1994) Effect of diet and stages of preg-nancy on blood chemistry and haematology of Djallonke sheep fed on diets containing various levels of cocoa pod husk (CPH), by E. N. Obese, A. K. Tuah, D. B. Okai, S.A Osei, E. B. Frimpong and A.N. Said. Ghana Journal of Biotechnology and Molecular Biology. 2(1): 44-51.

1094. Frimpong, E. B.; joint author (1994) The performance of growing Djal-lonke lambs fed feed containing different levels of cocoa pod husk, 10% NaOH-treated corn cobs and sundried caged layer manure, by E. Osei-Amaning, A.K.Tuah, E. K. Abu, E. B. Frimpong and D. Adomako. In: Proceedings, 11th International Cocoa Research Conference, Yamoussoukro, Republique de Côte d’ Ivoire, 1993. pp. 791-796.

1095. Frimpong, E. B.; joint author (1995) Response of laying chickens fed to graded levels of cocoa pod husk meal, by D. Adomako, S. A. Osei, P. K. Sarpong and E. B. Frimpong. Journal of the Univer-sity of Science and Technology (U.S.T.), Kumasi, Ghana, 15: 5-8.

1096. Frimpong, E. B.; joint author (1996) The cocoa breeding programme at the Cocoa Research Institute of Ghana (CRIG), Tafo, by Y. Adu-Ampomah, A. Abdul-Karimu and E. B. Frimpong. In: Proceed-ings of the International Workshop on the Utilization of the Genetic Resources of the International Cocoa Genebank, June 23-28, 1996, St. Augustine, Trinidad and Tobago. pp. 31-42.

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1098. Frimpong, E. B.; joint author (1999) The utilization of germplasm for the genetic improvement of cocoa in Ghana, by Y. Adu-Am-pomah, A. Abdul-Karimu and E. B. Frimpong. Journal of the Ghana Science Association [Special edition] 2(1): 99-102.

1099. Frimpong, E. B.; joint author (2002) The effects of Phytophthora pod rot infection on yield estimation in cocoa, by A. Abdul-Karimu, Y. Adu-Ampomah, B. Adomako, E. B. Frimpong and S. A. Bos-ompem. Journal of the Ghana Science Association 4: 27-32.

1100. Frimpong, E. B.; joint author (2003) Investigations into the use of the crinkle leaf mutant as a low vigour rootstock for high density plant-ing in cocoa, by Y. Adu-Ampomah, E. B. Frimpong, B. Ado-mako and A. Abdul-Karimu. In: Proceedings of the International Workshop on Cocoa Breeding for Improved Production Systems, 2003, edited by F. Bekele, M. J. End and A. B. Eskes. Accra, IN-GENIC and Ghana Cocoa Board. pp. 145 – 149.

1101. Frimpong, E. B.; joint author (2003) The effect of propagation media and wood-type on rooting of cffee stem cuttings, by E. Ofori-Gyamfi, E. B. Frimpong, F. M. Amoah and J. P. Tetteh. Journal of the Ghana Science Association 5(1): 26-34.

1102. Frimpong, E. B.; joint author (2005) Field performance of cocoa hy-brids treated with Paclobutrazol, by A. O. Dwapanyin and E. B. Frimpong In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 505 –513.

1103. Frimpong, E. B.; joint author (2006) Vulnerabiliyt and adaptation as-sessment under the Netherlands Climate Change Assistance Pro-gramme. Phase 2 (NCAP2): Vulnerability of agriculture to climate change – impact of climate on cocoa production, by G. J. Anim-Kwapong and E. B. Frimpong. Final report submitted to Environ-mental Protection Agency, Ghana. 122p.

1104. Frimpong, E. B.; joint author (2007) Preliminary studies on the influ-ence of Paclobutrazol on canopy size and early yield of some vigor-ous cocoa varieties, by A. O. Dwapanyin and E. B. Frimpong. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 739-747.

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1105. Frimpong, E. B.; joint author (2007) The effect of bean size and shade on the growth and development of nursery cocoa seedlings, by A. O. Dwapanyin and E. B. Frimpong. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1821-1826.

1106. Frimpong, E. B.; joint author (In press) Hormonal control of the early cocoa seedling growth and survival in the field, by A. O. Dwapa-nyin and E. B. Frimpong 1st Cocobod Conference for the Promo-tion of Local Consumption of Cocoa Products and 24th Biennial Con-ference of the Ghana Science Association on Maximising the Bene-fits of the Cocoa Tree, Accra, 2005.

1107. Frimpong, E. B.; joint author (In press) The effect of bean size and shade on the germination of cocoa beans, by A. O. Dwapanyin and E. B. Frimpong. 1st Cocobod Conference for the Promotion of Local Consumption of Cocoa Products and 24th Biennial Conference of the Ghana Science Association on Maximising the Benefits of the Cocoa Tree, Accra, Ghana. 2005.

1108. Frimpong, K.; joint author (2007) Physical and biochemical assess-ment of Ghana’s cocoa for quality assurance, by J. F. Takrama, P. C. Aculey, E. Owusu, F. Botchway, K. Frimpong, G. Pawar, S. Bediako and F. Asante. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1179-1185.

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1374. Legg, J. T.; joint author (1966) Investigations into the use of a patho-genic fungus (Cephalosporium sp.) as a means of controlling the mealybug (Pseudococcidae) vectors of cocoa swollen shoot virus in Ghana, by S. Rojter, J. K. Bonney and J. T. Legg. Ghana Journal of Science 6: 110-114.

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1543. Nkansah, A.; joint author (2006). Prospects of biological control of the cocoa mirid Sahlbergella singularis Sahl. (Heteroptera) in Ghana: Field surveys for entomopathogens and laboratory bioassays with Beauveria bassiana isolates, by J. B. Ackonor, I. Y. Opoku, G. Oduor, G. Ignas and A. Nkansah. Papua New Guinea Journal of Agriculture Forestry and Fisheries 49: 7-11.

1544. Novak, F. J.; Donini, B.; Owusu, G. K. (1985). Somatic embryogenesis and in vitro plant development of cocoa. In: IAEA/FAO International Symposium on Nuclear techniques and in vitro culture for plant im-provement, 19-23 Aug. 1985, Vienna, Austria. pp. 443-449.

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1545. Nuamah, E. A.; joint author 1972). Nursery diseases of cocoa in Ghana: 1. Pre- and post-emergence deaths of seedlings caused by Phytophthora palmivora, by A. Asare-Nyako, J. D. Amponsah, and E. A. Nuamah. Ghana Journal of Agricultural Science 5: 127-133.

1546. Nuertey, B. N.; Amoah, F. M.; Opoku, A.; Asamoah, T. E. O.; Op-pong, F. K.; Osei-Bonsu, K.; Marfo-Ahenkora, E. (2006). Income intensification strategy: Determination of the optimum time to un-derplant oil palm with cocoa. Journal of the Ghana Science Associa-tion 8: 26-37.

1547. Obese, E. N.; Tuah, A. K.; Okai, D. B.; Osei, S.A.; Frimpong, E. B.; SAID, A.N. (1994). Effect of diet and stages of pregnancy on blood chemistry and haematology of Djallonke sheep fed on diets con-taining various levels of cocoa pod husk (CPH). Ghana Journal of Biochemistry, Biotechnology and Molecular Bioliogy. 2: 44-51.

1548. Oddoye, E. O. K.; Agyente-Badu, C. K.; Johnson, V.; Asante, E. G. (2007). Feeding broiler chickens with rations containing dried cocoa pod husk: A practical experience at the Cocoa Research In-stitute of Ghana, Tafo. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1423-1427.

1549. Oddoye, E. O. K.; Takrama, J. F.: Owusu-Ansah, F.; Johnson, V. (2008). Supplementation of grazing cattle: the use of a diet con-taining graded levels of dried cashew pulp. Bulletin of Animal Health and Production in Africa 56(2): 136-142.

1550. Oddoye, E. O. K.; joint author (2005) Uses of the cocoa by-products, by C. K. Agyente-Badu and E. O. K. Oddoye. (2005). In: Ghana Science Association 24th Biennial Conference. Plenary presenta-tions, 1st -4th August, 2005. pp. 115-127. pp. 115-127.

1551. Oddoye, E. O. K.; joint author (2005). Application of fungal biotech-nology: processing of cocoa pod husk into nutritious animal feed using the oyster mushroom (Pleurotus ostreotus) as bio-catalyst, by U. P. Dzogbefia, F. Alemawor, J. H. Oldham and E. O. K. Odd-oye. Paper presented at the 24th Biennial Conference of the Ghana Science Association, 2005.

1552. Ofori-Frimpong, K. (1992). Decomposition and N and P dynamics of cocoa leaf materials and the effect of cocoa leaf litter on the trans-

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formations of N and P in cocoa growing soils of Ghana. Ph. D. The-sis, University of Reading, U.K. 178p.

1553. Ofori-Frimpong, K.; Afrifa, A.A.; Akrofi, A. Y.; Sarfo, J.E. (2007). Development of cocoa pod husk-based compost for nursing cocoa seedlings. In: Proceedings, 15th International Cocoa Research Con-ference, San Jose, Costa Rica, 2006. pp. 1635-1644.

1554. Ofori-Frimpong, K.; Afrifa, A.A.; Amoah, F.M.; Appiah, M.R. (2007). Evaluation of some organic matter recycling methods on soil fertility improvement and cocoa productivity. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 405-411.

1555. Ofori-Frimpong, K.; Afrifa, A.A.; Appiah, M.R. (2002). Growth and nutrient uptake of some cocoa varieties grown in contrasting soils. Ghana Journal of Agricultural Science 35: 41-48.

1556. Ofori-Frimpong, K.; Afrifa, A. A.; Appiah, M. R. (2005). Effect of ni-trogen rates and frequency of application on cocoa yield, soil and mineral composition of cocoa leaves. In: Proceedings, 14th Interna-tional Cocoa Research Conference, Accra, Ghana, 2003. pp. 239-245.

1557. Ofori-Frimpong, K., Afrifa, A. A.; Appiah, M.R. (2006). Improving the growth of cocoa seedlings in nursery by the use of fertilizers. Journal of the Ghana Science Association 8: 85-91.

1558. Ofori-Frimpong, K.; Afrifa, A. A; Oppong, F.K; Appiah, M.R. (2007). Effect of weed control methods on some soil properties of newly planted cocoa farm. Ghana Journal of Agricultural Science 40(2): 127-133.

1559. Ofori-Frimpong, K.; Afrifa, A. A.; Osei Bonsu, K.; Appiah, M.R. (2005). Cocoa /Coconut intercropping trial in Ghana: Effect of the cropping systems on soil nutrient dynamics. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 303-308.

1560. Ofori-Frimpong, K.; Appiah, M. R.; Afrifa, A. A. (1999). Alleviating rural poverty through fertilty management of cocoa soils in Ghana – A case study. In: Proceedings of the 11th Annual General Meeting of the Soil Science Society of Ghana 16: 133-137.

1561. Ofori-Frimpong, K.; Appiah, M. R.; Afrifa, A. A.; Oppong, F.K. (In press). Microbial biomass and extractable N and P contents of soils under different weed control methods in cocoa plantation. In: Pro-ceedings of the 17th Annual General Meeting of the Soil Science So-ciety of Ghana, Tamale, Ghana, 26th February-2nd March 2001.

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1562. Ofori-Frimpong, K.; Asamoah, G. K.; Appiah, M. R.; (1999). Distri-bution of free and total aluminium in some cocoa-growing soils of Ghana. Ghana Journal of Agricultural Science 32: 101-107.

1563. Ofori-Frimpong, K.; Asase, A.; Mason, J.; Aduse-Poku, K.; Amertodo, E.; Atinga, J. P.; Ekpe, P.; Danku, L. (2007). Cocoa farming and con-servation: baseline information and biological diversity in tradi-tional cocoa farms in Ghana. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1665-1676.

1564. Ofori-Frimpong, K.; Asase, A.; Mason, J.; Donkor, L. (2007). Shaded versus unshaded cocoa: implications on litter fall, decomposition, soil fertility and cocoa pod development. Proceedings of 2nd Inter-national Symposium on Multistrata Agroforestry Systems with Perennial Crops: making ecosystem services count for farmers, consumers and the environment, 17 -21 September, 2007, Catie, Turrialba, Costa Rica. Available from http://web. Catie. Ac.er/AFS/Symposium.

1565. Ofori-Frimpong, K.; Oppong, F. K.; Appiah, M. R.; Afrifa, A. A. (2001). Screening of some leguminous plants for soil fertility im-provement and weed management during cocoa establishment. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Malaysia, 2000. pp. 1277-1286.

1566. Ofori-Frimpong, K.; Powell, D. L. (1998). The decomposition of cocoa leaves and their effect on phosphorus dynamics in tropical soil. Eu-ropean Journal of Soil Science 50: 165-172.

1567. Ofori-Frimpong, K.; Powell, D. L.; Appiah, M. R. (1997). Effect of phosphorus fertilizer application on some forms of phosphorus in selected Ghanaian cocoa-growing soils. Ghana Journal of Agricul-tural Science 30: 23-29.

1568. Ofori-Frimpong, K.; Rowell, D. L.; Appiah, M. R.; Halm, B. J. (1999). The effects of cocoa leaf litter and P fertilizer on the trans-formation of P in cocoa growing soils of Ghana. In: Efficient Soils and Water Management: a Prerequisite for Sustainable Agriculture. Proceedings of the 14th/15th Annual General Meeting of the Soil Science Society of Ghana, 1997, Accra, Ghana. pp.43-49.

1569. Ofori-Frimpong, K.; joint author (1990). Note on the effect of cocoa pod ash on some forms of soil potassium in Ghana, by M. R. Ap-piah, K. Ofori-Frimpong and Y. Ahenkorah. Planter 66: 227-232.

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1570. Ofori-Frimpong, K.; joint author (1997). The consequences of cocoa production on soil fertility in Ghana: a review, by M. R. Appiah, S. T. Sackey, K. Ofori-Frimpong, and A. A. Afrifa. Ghana Journal of Agricultural Science 30: 183-190.

1571. Ofori-Frimpong, K.; joint author (1999). Prospects of fertilizer use in the cocoa industry in Ghana, by M. R. Appiah, K. Ofori-Frim-pong, A. A. Afrifa and E. G. Asante. In: Efficient soil and water management: A prerequisite for sustainable agriculture. Proceed-ings of the 14th & 15th Annual General Meetings of the Soil Sci-ence Society of Ghana, 1997, Accra. Ghana. pp. 215-221.

1572. Ofori-Frimpong, K.; joint author (2000). Sustainable cocoa produc-tion in Ghana through soil fertility management, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa, E. G. Asante, K. Opoku-Ameyaw and J. B. Danquah. : Margaret Opferkuch Award for Best Innovation in the Cocoa Industry in Ghana for the year 2000. 27p.

1573. Ofori-Frimpong, K.; joint author (2003). Effects of mulching on soil nutrients and yield of Robusta coffee, by A. A. Afrifa, K. Ofori-Frimpong, M. R. Appiah and B. J. Halm, Tropical Agriculture 80: 105-09.

1574. Ofori-Frimpong, K.; joint author (2003). Intercropping Robusta coffee with some edible crops in Ghana: agronomic performance and eco-nomic returns, by K. Opoku-Ameyaw, F. K. Oppong, K. Ofori-Frimpong, F. M. Amoah and K. Osei-Bonsu. Ghana Journal of Agricultural Science 36: 13-21.

1575. Ofori-Frimpong, K.; joint author (2003). Using 32 P soil injection tech-nique in the root activity studies of Gliricidia sepium, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, M. R. Appiah and K. Ofori- Frimpong. Journal of the Ghana Science Association 5: 45–52.

1576. Ofori-Frimpong, K.; joint author (2004). The use of fertilizer and fungicide to sustain cocoa production in severe blackpod areas, by I. Y. Opoku, K. Ofori-Frimpong and M. R. Appiah. Tropical Sci-ence 44: 95-99.

1577. Ofori-Frimpong, K.; joint author (2004). Use of sodium chloride to control epiphytes on cocoa in Ghana, by K. Acheampong and K. Ofori-Frimpong. Tropical Science 44: 51-53.

1578. Ofori-Frimpong, K.; joint author (2005). Biological and economic evaluation of some cocoa/food crop intercropping packages at es-tablishment, by K. Opoku-Ameyaw, K. Osei-Bonsu, K. Ofori-Frimpong and K. Acheampong. In: Proceedings, 14th Interna-

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tional Cocoa Research Conference, Accra, Ghana, 2003. pp. 523-529.

1579. Ofori-Frimpong, K.; joint author (2005). The effect of mulch on the establishment and early yield of cocoa, by F. M. Amoah, K. Osei-Bonsu, F. K. Oppong, K. Opoku-Ameyaw and K. Ofori-Frim-pong, In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp 1301-1308.

1580. Ofori-Frimpong, K.; joint author (2005). Use of 32 P and 15N to deter-mine the efficiency of utilization of phosphorus and nitrogen fertil-izers in cocoa seedlings, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, M. R. Appiah, and K. Ofori-Frimpong. In: Proceed-ings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 231- 237.

1581. Ofori-Frimpong, K.; joint author (2006). Sustainable cocoa produc-tion in Ghana through soil fertility management, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa and K. Opoku-Ameyaw. In: Proceedings of the International Conference on Managing Soil Re-sources of the Tropics for Sustainable Agricultural Productivity and Annual General Meeting of the Soil Science Society of Ghana, 17/18: 121-129.

1582. Ofori-Frimpong, K.; joint author (2007). Boron levels in soils cropped to coffee and their relationships to some soil properties in Ghana, by A. A. Afrifa, K. Ofori-Frimpong and M. K. Abekoe. West African Journal of Applied Ecology 11: 189-196.

1583. Ofori-Frimpong, K.; joint author (2007). Comparison of cocoa Re-search Institute of Ghana recommendations and traditional farmer methods on cocoa establishment, by F. K. Oppong, E. G. As-ante, K. Opoku-Ameyaw, E. A. Dwomoh, K. Ofori-Frimpong and A. Osei-Wusu. In: Proceedings, 15th International Cocoa Re-search Conference, San Jose, Costa Rica, 2006. pp.: 273-280.

1584. Ofori-Frimpong, K.; joint author (2007). Effects of polybag size and foliar application of urea on cocoa seedling growth, by F. K. Op-pong, K. Ofori-Frimpong and R. Fiakpornu. Ghana Journal of Agricultural Science 40(2): 207-213.

1585. Ofori-Frimpong, K.; joint author (2007). Investigations into the criti-cal period of weed competition in young Theobroma cacao L., by F. K. Oppong, K. Opoku-Ameyaw, K. Ofori-Frimpong and F. Owusu-Ansah. In: Proceedings, 15th International Cocoa Re-search Conference, San Jose, Costa Rica, 2006. pp. 1: 281-290.

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1586. Ofori-Frimpong, K.; joint author (2007). Nitrogen, phosphorus and potassium budget under the cocoa ecosystem: produce harvesting phase, by A. A. Afrifa, K. Ofori-Frimpong, M. R. Appiah, S. Acquaye and D. Snoeck, In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 395-404.

1587. Ofori-Frimpong, K.; joint author (2007). Responses of different cocoa varieties to different phosphorus sources, by A. A. Afrifa, A. R. Zaharah, Y. Adu-Ampomah, K. Ofori-Frimpong and M. R. Ap-piah, In: Proceedings, 15th International Cocoa Research Confer-ence, San Jose, Costa Rica, 2006. pp. 731-733.

1588. Ofori-Frimpong, K.; joint author (2007). Soil diagnostic method for formulating fertilizer requirements on cocoa plantations, by D. Snoek, M. K. Abekoe, M. R. Appiah, A. A. Afrifa and K. Ofori-Frimpong. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 387-394.

1589. Ofori-Frimpong, K.; joint author (2008). Effects of fertilizer on nitro-gen contents of berries of three coffee clones and berry infestation by the coffee berry borer, Hypothenemus hampei (Ferr.) (Coleoptera: Scolytidae), by E. A. Dwomoh, K. Ofori-Frimpong, A. A. Afrifa and M. R. Appiah. African Journal of Agricultural Re-search 3(2): 111-114.

1590. Ofori-Frimpong, K.; joint author (In press). Residual effects of oxyflu-orfen on cocoa seedlings and its mobility in cocoa-growing soil, by F. K. Oppong, K. Osei-Bonsu and K. Ofori-Frimpong. Journal of the Ghana Science Association.

1591. Ofori-Frimpong, K.; joint author (In press). The economics of fertilizer use on some peasant cocoa farms in Ghana, by E. G. Asante, M. R. Appiah, K. Ofori-Frimpong and A. A. Afrifa, Ghana Journal of Agricultural Science 33

1592. Ofori-Frimpong, K.; joint author (In press). The response of cocoa yield to fertilizer application under different farm maintenance practices, by K. Opoku-Ameyaw, M. R. Appiah, K. Ofori-Frim-pong and A. A. Afrifa. In: Managing Soils for Sustainable Produc-tion of Food and Industrial Crops: Proceedings of the16th Annual General Meeting of the Soil Science Society of Ghana. pp. 105-112.

1593. Ofori-Gyamfi, E.; Amoah, F. M.; Frimpong, E. B.; Tetteh, J. P. (2001). The effect of shading stock plant on rooting in coffee. In: Proceed-ing of the 19th International Scientific Colloquium on Coffee, Tri-este, Italy, 14-18th May 2001. [4p.] (On compact disc)

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1594. Ofori-Gyamfi, E.; Frimpong, E. B.; Amoah, F. M.; Tetteh, J. P. (2003). The effect of propagation media and wood-type on rooting of cof-fee stem cuttings. Journal of the Ghana Science Association 5(1): 26-34.

1595. Okai, D. B.; Osafo, E. L. K.; Adomako, D. (1985). Effect of different lev-els of cocoa pod husk on performance and carcass characteristics of finisher pigs. In: Proceedings, 9th International Cocoa Research Conference, Lome, Togo, 1984. pp. 455-459.

1596. Okali, D. U.; Owusu, J. K. (1975). Growth analysis and photosynthetic rates of cocoa (Theobroma cacao L.) seedlings in relation to vary-ing shade and nutrient regimes. Ghana Journal of Agricultural Sci-ence 8: 51-67.

1597. Ollennu, L. A. A. (1977). Studies on a swollen shoot virus isolate from the Brong Ahafo Region of Ghana. In: Proceedings, 5th Interna-tional Cocoa Research Conference, Ibadan, Nigeria, 1975. pp. 429-431.

1598. Ollennu, L. A. A. (1981). Comparison of two strains of cocoa swollen shoot virus. In: Proceedings, 7th International Cocoa Research Conference, Douala, Cameroun, 1979. pp. 383-386.

1599. Ollennu, L. A. A. (1988). An update on the swollen shoot disease problem in Ghana. In: Proceedings of the Seminar on National Pre-paredness for Disasters and Workshop on Cocoa. pp. 94-106.

1600. Ollennu, L. A. A. (2003). Synthesis: Case history of cocoa viruses. In: Plant Virology in Sub-Saharan Africa, edited by J. d’A. Hughes and B. O. Odu. pp. 33-49.

1601. Ollennu, L. A. A.; Hughes, J. d'A. (1994). The future of cocoa swollen shoot virus control in Ghana. In: Proceedings of the 1st

Malaysian International Cocoa Research Conference, 1991, Kuala Lumpur, Malaysia. pp. 272-284.

1602. Ollennu, L. A. A.; Hughes, J. d’A.; Owusu, G. K. (1996). Mild strain cross-protection of cocoa against cocoa swollen shoot badnavirus. Tropical Science 36: 116-128.

1603. Ollennu, L. A. A.; Hughes, J. d’A.; Owusu, G. K.; Amponsah, J. D. (1994). The separation and detection of mild strains of cocoa swollen shoot virus. In: Proceedings, 11th International Cocoa Re-search Conference, Yamoussoukro, Republique de Côte d’Ivoire, 1993. pp. 261-267.

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1604. Ollennu, L.A.A.; Osei-Bonsu, K.; Aneani, F.; Acheampong, K. (2005). Preliminary studies of the control of cocoa swollen shoot disease by the use of immune crops as barriers. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 839-843.

1605. Ollennu, L. A. A.; Owusu, G. K. (1988). Studies of the re-infection of replanted cocoa by cocoa swol1en shoot virus in Ghana. In: Pro-ceedings, 10th International Cocoa Research Conference, Santo Domingo, Dominican Republic, 1987. pp. 515-520.

1606. Ollennu, L. A. A.; Owusu, G. K. (1989). Isolation and study of mild strains of cocoa swollen shoot virus for possible cross protection. In: Proceedings of the4th International Plant Virus Epidemiology Workshop, 1989, Montpellier, France. pp.119-122.

1607. Ollennu, L. A. A.; Owusu, G. K. (1997). Mild virus strain protection studies with cocoa swollen shoot badnavirus in Ghana. In: Proceed-ings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 204-211.

1608. Ollennu, L. A. A; Owusu, G. K. (2001). Cocoa swollen shoot virus re-infection of replanted cocoa: a case study. In: Proceedings, 13th In-ternational Cocoa Research Conference, 2000, Kota Kinabalu, Sabah, Malaysia. pp. 769-776.

1609. Ollennu, L. A. A; Owusu, G. K. (2002). Spread of cocoa swollen shoot virus to cacao (Theobroma cacao) plantings in Ghana. Tropi-cal Agriculture 79: 224-230.

1610. Ollennu, L. A. A; Owusu, G. K. (2002). The use of cocoa seedlings for field evaluation of mild strain protection against cocoa swollen shoot badnavirus. Journal of the Ghana Science Association 4(1):15-18.

1611. Ollennu, L. A. A; Owusu, G. K. (2003). Field evaluation of the protec-tive capability of CSSV mild strain N1 against severe strain New Juaben (1A) isolate. Ghana Journal of Agricultural Science 36: 3-12.

1612. Ollennu, L. A. A.; Owusu, G. K.; Dzahini-Obiatey, H. (1999). Re-cent studies of mild strain cross-protection with cocoa swollen shoot virus. Journal of the Ghana Science Association (Special Edi-tion) 2(3): 5-11.

1613. Ollennu, L. A. A.; Owusu, G. K.; Thresh, J. M. (1989). The control of swollen shoot disease in Ghana. Cocoa Growers’ Bulletin 42: 25-35.

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1614. Ollennu, L. A. A.; Owusu, G. K.; Thresh, J. M. (1989). The spread of cocoa swollen shoot virus to recent plantings in Ghana. Crop Pro-tection 8: 251-264.

1615. Ollennu, L. A. A.; joint author (1978). The problems of controlling co-coa swollen shoot disease in Ghana, by J. T. Legg, G. K. Owusu, L. A. A. Ollennu and N. K. Lovi. In: Proceedings, 6th Interna-tional Cocoa Research Conference, Caracas, Venezuela, 1977. pp. 267-278.

1616. Ollennu, L. A. A.; joint author (1984). Coppicing experiments on the spread and control of swollen shoot virus in Ghana, by J. T. Legg, N. K. Lovi, L. A. A. Ollennu, G. K. Owusu and J. M. Thresh. Crop Protection 3: 289-304.

1617. Ollennu, L. A. A.; joint author (1988). Cocoa swollen shoot: an arche-typal crowd disease, by J. M. Thresh, G. K. Owusu and L. A. A. Ollennu. Zeitschrift fur Pflanzenkrankeiten und Pflanzenschutz 94: 428-446.

1618. Ollennu, L. A. A.; joint author (1990). Cocoa Research Institute inter-actions with extension personnel of CSD and cocoa/coffee farmers, by K. Osei-Bonsu and L. A. A. Ollennu. In: Proceedings of the 1st Farming Systems Workshop, 1990, CRIG, Tafo, Ghana. pp.77-81.

1619. Ollennu, L. A. A.; joint author (1993). The virobacterial agglutination test as a rapid means of detecting cocoa swollen shoot virus, by J. d' A. Hughes and L. A. A. Ollennu. Annals of Applied Biology 122: 299-310.

1620. Ollennu, L. A. A.; joint author (1994). Microbiology National Biodiver-sity Survey for Ghana, commissioned by the Ministry of Environ-ment, Science and Technology, by G. C. Clerk, G. T.; Odamtten, L. A. A. Ollennu, B. K. Collison and F. O. K. Seku. 155p.

1621. Ollennu, L. A. A.; joint author (1994). Mild strain protection of cocoa in Ghana against cocoa swollen shoot virus: a review, by J. d' A. Hughes and L. A. A. Ollennu. Plant Pathology 43: 442-457.

1622. Ollennu, L. A. A.; joint author (1995). Evidence from the virobacterial agglutination test for the existence of eight serogroups of cocoa swollen shoot virus, by J. d’A. Hughes, D. Adomako and L. A. A. Ollennu. Annals of Applied Biology 127: 297-307.

1623. Ollennu, L. A. A.; joint author (1996). Breeding for resistance to the cocoa swollen shoot virus in Ghana, by Y. Adu-Ampomah, B. Adomako, G. K. Owusu and L. A. A. Ollennu. In: Proceedings of the International Workshop on the Contribution of Disease Resis-

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tance to Cocoa Variety Improvement, Salvador, Bahia, Brazil, 1996. pp. 173-79.

1624. Ollennu, L. A. A.; joint author (1997). The problem of the reinfection of replanted cocoa by cocoa swollen shoot virus in Ghana, by G. K. Owusu and L. A. A. Ollennu. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 179-189.

1625. Ollennu, L. A. A.; joint author (1999). Breeding for resistance to co-coa swollen shoot virus in Ghana, by Y. Adu-Ampomah, B. Ado-mako, G. K. Owusu and L. A. A. Ollennu. In: Proceedings of the International Workshop on the Contribution of Disease Resistance to Cocoa Variety Improvement, Salvador, Bahia, Brazil, 1996. pp.173-179.

1626. Ollennu, L. A. A.; joint author (1999). Some recent studies on the control of cocoa swollen shoot disease, by G. K. Owusu and L. A. A. Ollennu. In: Proceedings of the 17th Biennial Conference of the Ghana Science Association. (Special Edition) pp.212-216.

1627. Ollennu, L. A. A.; joint author (1999). Symptomatic evaluation of an infectious clone of cocoa swollen shoot badnavirus (CSSV), by H. K. Dzahini-Obiatey, S. T. Sackey and L. A. A. Ollennu. Paper presented at the 21st Biennial Conference of the Ghana Science Association, 1999, Univ. of Ghana.; Legon, Accra.

1628. Ollennu, L. A. A.; joint author (1999). The prospects for mild strain cross-protection to control cocoa swollen shoot disease in Ghana, by G. K. Owusu, L. A. A. Ollennu and H. Dzahini-Obiatey. In: Proceedings, 12th International Cocoa Research Conference, Sal-vador, Bahia, Brazil, 1996. pp. 121-127.

1629. Ollennu, L. A. A.; joint author (2001). Effects of cocoa swollen-shoot virus on the yield of mature bearing trees of Upper Amazon cocoa hybrids in Ghana, by B. Adomako, Y. Adu-Ampomah, G. K. Owusu and L. A. A. Ollennu. Journal of the Ghana Science Asso-ciation 3: 1-6.

1630. Ollennu, L. A. A.; joint author (2002). Breeding and genetics of cocoa swollen shoot virus disease resistance in Theobroma cacao L., by Y. Adu-Ampomah, L. A. A. Ollennu, B. Adomako and B. Padi, Journal of the Ghana Science Association 4: 8-21.

1631. Ollennu, L. A. A.; joint author (2003). A method for the elucidation of pathogenic related proteins of cocoa swollen shoot badnavirus (CSSV), by H. Dzahini-Obiatey, P. C. Aculey, J. F. Takrama, S. T. Lowor and L. A. A. Ollennu. Journal of the Ghana Science As-sociation 5(2): 93-99.

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1632. Ollennu, L. A. A.; joint author (2003). Cocoa, by M. J. Jeger, L. A. A. Ollennu, L. S. Hagen and M. Jacquemond. In: Virus and Virus-like Diseases of Major Crops in Developing Countries, edited by Gad Loebenstein and George Thottappilly. Dordrecht, Kluwer Aca-demic Publishers. pp. 519-542.

1633. Ollennu, L. A. A.; joint author (2003). (2003) Detection of cocoa swollen shoot badnavirus (CSSV) by enzyme-linked immunosorb-ent assay (ELISA): Recent developments, by H. K. Dzahini-Obi-atey, P. C. Aculey, L. A. A. Ollennu and G.K. Owusu. Journal of the Ghana Science Association 5(1): 1-7.

1634. Ollennu, L. A. A.; joint author (2004). Detection of cocoa swollen shoot virus (CSSV) by enzyme-linked immunorsorbent assay (ELISA) in asymptomatic plants, by H. K. Dzahini-Obiatey, P. C. Aculey and L. A. A. Ollennu. Proceedings of INCOPED 4th Inter-national Seminar on Cocoa Pests and Diseases, 2003, Accra, Ghana. pp. 139-146.

1635. Ollennu, L. A. A.; joint author (2005). Breeding for cocoa varieties re-sistant/tolerant to cocoa swollen shoot virus, by B. Adomako, Y. Adu-Ampomah, L. A. A. Ollennu, H. Dzahini-Obiatey and J. F. Takrama. Final Report of Ghana/E.U. Cocoa Sector Support Pro-gramme (April, 2000 – December, 2004). pp. 6–24.

1636. Ollennu, L. A. A.; joint author (2005). Inhibition of cocoa swollen shoot badnavirus (CSSV) by an antiviral substance, by H. K. Dza-hini-Obiatey, P. C. Aculey and L. A. A. Ollennu. Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 1365-1371.

1637. Ollennu, L. A. A.; joint author (2005). Sources of resistance to cocoa swollen shoot virus disease, by Y. Adu-Ampomah, L. A. A. Ol-lennu and B. Adomako. In: Proceedings, 14th International Co-coa Research Conference, Accra, Ghana, 2003. pp. 643-651.

1638. Ollennu, L. A. A.; joint author (2005). The development of Phytoph-thora canker on different cocoa genotypes infected and uninfected with cocoa swollen shoot virus, by I. Y. Opoku, J. T. Dakwa and L. A. A. Ollennu. Tropical Science 45: 50-53.

1639. Ollennu, L. A. A.; joint author (2006). Control of cocoa swollen shoot disease by eradication of infected tres in Ghana: a survey of treated and replanted, by H. Dzahini-Obiatey, G. Ameyaw Ak-umfi and L. A. A. Ollennu. Crop Protection 25: 647-652.

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1640. Ollennu, L. A. A.; joint author (2006). Evaluation of resistance to co-coa swollen shoot virus (CSSV): methods, problems and selections, by B. Adomako, Y. Adu-Ampomah and L. A. A. Ollennu. In Fi-nal Report of the CFC/ICCO/ IPGRI Project on Cocoa Germplasm Uti-lization and Conservation: A Global Approach, 1998-2004, edited by A. B. Eskes and Y. Efron. Amsterdam, the Netherlands, CFC / London, U.K., ICCO/ Rome, Italy, IPGRI, pp. 208-216.

1641. Ollennu, L. A. A.; joint author (2007). Eradication of cocoa swollen shoot disease in Ghana: Is the battle being won or lost? by H. Dza-hini-Obiatey, G. Ameyaw Akumfi and L. A. A. Ollennu. In: Pro-ceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 899-906.

1642. Ollennu, L. A. A.; joint author (In press). Cocoa swollen shoot bad-navirus: a review of diagnostic procedures, by H. K. Dzahini-Obi-atey, P. C. Aculey and L. A. A. Ollennu. Ghana Journal of Agri-cultural Science.

1643. Opoku, A.; joint author (2006). Income intensification strategy: Deter-mination of the optimum time to underplant oil palm with cocoa, by B. N. Nuertey, F. M. Amoah, A. Opoku, T. E. O. Asamoah, F. K. Oppong, K. Osei-Bonsu and E. Marfo-Ahenkora. Journal of the Ghana Science Association 8: 26-37.

1644. Opoku, I. Y. (1993). Survival of Phytophthora palmivora and Phytoph-thora megakarya in soil and cocoa roots. Ph. D Thesis, University of London.

1645. Opoku, I. Y. (1995). Characterization of Phytophthora isolates and de-velopment of a selective medium for isolation of P. palmivora and P. megakarya from soil. CRIG Newsletter 12: p.2.

1646. Opoku, I. Y. (1997). Phytophthora megakarya in Ghana. INCOPED Newsletter 1: 4-5.

1647. Opoku, I. Y. (2005). In vitro production of sporangia and zoospores by Phytophthora palmivora and Phytophthora megakarya in succes-sive harvests on the same culture plate. In: Procedings, 14th Inter-national Cocoa Research Conference, Accra, Ghana, 2003. pp. 59-69.

1648. Opoku, I. Y.; Akrofi, A. Y. (2002). The role of temporal shade crops in the spread of Phytophthora megakarya. Journal of the Ghana Science Association 5(1):15-19.

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1649. Opoku, I. Y.; Akrofi, A. Y.; Abdul Abdul-Karimu, A.; Adu-Am-pomah, Y. (2005). Selection of cocoa genotypes as parents for re-sistance to Phytophthora megakarya and Phytophthora palmivora. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 817-825.

1650. Opoku, I. Y.; Akrofi, A. Y.; Adu-Ampomah, Y.; Assuah, M. K. K. (2007). Farmers’ fields: Potential source of blackpod resistant ma-terials. In: Proceedings, 15th International Cocoa Research Confer-ence, San Jose, Costa Rica, 2006. pp. 1015-1022.

1651. Opoku, I. Y.; Akrofi, A. Y.; Appiah, A. A. (1997). The spread of Phy-tophthora megakarya on cocoa in Ghana. In: Proceedings, 1st In-ternational Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 98-107.

1652. Opoku, I. Y.; Akrofi, A. Y.; Appiah, A. A. (1999). The occurrence and distribution of Phytophthora canker on cocoa in Ghana. In: Pro-ceedings, 12th International Cocoa Research Conference, Sal-vador, Bahia, Brazil, 1996. pp.113-119.

1653. Opoku, I. Y.; Akrofi, A. Y.; Appiah, A. A. (1999). The spread of Phy-tophthora megakarya on cocoa in Ghana. Journal of the Ghana Sci-ence Association (Special Edition) 2(3): 110-116.

1654. Opoku, I. Y.; Akrofi, A. Y; Appiah, A. A (2002). Shade trees are al-ternative hosts of the cocoa pathogen, Phytophthora megakarya. Crop Protection 21: 629-634.

1655. Opoku, I. Y.; Akrofi, A. Y.; Appiah, A. A. (2006). Assessment of san-itation and fungicide application directed at the cocoa tree trunks for the control of Phytophthora blackpod infections in pods growing in the canopy. European Journal of Plant Pathology 117:167-173

1656. Opoku, I. Y.; Akrofi, A. Y.; Appiah, A. A.; Luterbacher, M. L. (1998). Trunk injection of potassium posphonate for the control of black pod disease of cocoa. Tropical Science 38: 179-185.

1657. Opoku, I. Y.; Akrofi, A. Y.; Holderness, M.; Holmes, K. A. (2004). Phosphonic acid: An alternative approach to the control of black-pod disease of cocoa caused by Phytophthora megakarya. In: Pro-ceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, 2003, Accra, Ghana. pp. 59-69.

1658. Opoku, I. Y.; Akrofi, A. Y; Osei-Bonsu. K.; Acheampong, K. (2001). An outbreak of pink disease in Ghana. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 761-767.

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1659. Opoku, I. Y.; Appiah, A. A; Akrofi, A. Y; Owusu, G. K. (2000). Phy-tophthora megakarya: a potential threat to the cocoa industry in Ghana. Ghana Journal of Agricultural Science 33: 237-248.

1660. Opoku, I. Y.; Assuah, M. K. K.; Aneani F. (2007). Management of blackpod disease of cocoa with reduced number of fungicide appli-cation and crop sanitation. African Journal of Agricultural Research 2(11): 601-604.

1661. Opoku, I. Y.; Assuah, M. K. K.; Domfeh, O. (2007). Manual for the identification and control of diseases of cocoa in Ghana. Cocoa Re-search Institute. Technical Bulletin, No. 16. 33p.

1662. Opoku, I. Y.; Dakwa, J. T.; Ollennu, L. A. A. (2005). The develop-ment of Phytophthora canker on different cocoa genotypes in-fected and uninfected with cocoa swollen shoot virus. Tropical Sci-ence 45: 50-53.

1663. Opoku, I. Y.; Gyasi, E. K.; Onyina, G. K.; Opoku, E.; Fofie, T. (2007). The National Cocoa Diseases and Pests Control (CODAPEC) Pro-gramme: achievements and challenges. In: Proceedings, 15th In-ternational Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 1007-1013.

1664. Opoku, I. Y.; Ofori-Frimpong, K.; Appiah, M.R. (2004). The use of fertilizer and fungicide to sustain cocoa production in severe black-pod areas. Tropical Science 44: 95-99.

1665. Opoku, I. Y.; Owusu, G. K. (1995). A severe type of blackpod disease in Ghana. CRIG Newsletter 11: 1-4.

1666. Opoku, I. Y.; Wheeler, B. E. J. (1998). Survival of Phytophthora palmivora and Phytophthora megakarya on, and in roots of cocoa seedlings. Cocoa Growers’ Bulletin 51: 33-41

1667. Opoku, I. Y.; Wheeler, B. E. J. (1999). Detection of survival structures of Phytophthora palmivora and Phytophthora megakarya in cocoa roots. In: Proceedings, 12th International Cocoa Research Confer-ence, Salvador, Bahia, Brazil, 1996. pp. 235-238.

1668. Opoku, I. Y.; joint author (1996). The blackpod resistance breeding programme in Ghana, by A. Abdul-Karimu, Y, Adu-Ampomah, J. D. Amponsah and I. Y. Opoku. In: Proceedings of Ingenic Workshop on the Contribution of Disease Resistance to Cocoa Vari-ety Improvement. 1996, Salvador-Bahia, Brazil. pp. 149-158.

1669. Opoku, I. Y.; joint author (1997). On-farm farmer-managed fungicide trials to control blackpod disease caused by Phytophthora megakarya in Ghana, by A. Y. Akrofi, I. Y. Opoku and A. A.

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Appiah In: Proceedings, 1st International Cocoa Pests and Dis-eases Seminar, 1995, Accra, Ghana. pp.109-118.

1670. Opoku, I. Y.; joint author (1999). Phytophthora species differentiation by analysis of randomly amplified polymorphic DNAs, by S. T. Sackey, A. Y. Akrofi, A. A. Appiah and I. Y. Opoku. In: Pro-ceedings, 12th International Cocoa Research Conference, Sal-vador, Bahia, Brazil, 1996. pp. 107-112.

1671. Opoku, I. Y.; joint author (2000). Managing the Phytophthora pod rot disease of cocoa: the Ghana experience, by A. Y. Akrofi and I. Y. Opoku. In: Proceedings of INCOPED 3rd International Cocoa Pests and Diseases Seminar, 2000, Kota Kinabalu, Sabah, Malaysia. pp. 78-83.

1672. Opoku, I. Y.; joint author (2001). Phytophthora invasion of cocoa pod and bean, by A. Y. Akrofi and I. Y. Opoku. Journal of the Ghana Science Association 4: 56-62.

1673. Opoku, I. Y.; joint author (2001). Recent advances in the development of integrated pest management strategy for the control of cocoa mirids and mealybug vectors of CSSV disease in Ghana, by B. Padi, J. B. Ackonor, I. Y. Opoku, D. Hall, D. Farman, M. Down-ham, G. Oduor, S. Lowor, E. Owusu-Manu, Y. Adu-Ampomah, J. E. Sarfo, R. Adu-Acheampong, I. Reich and E. Adusei. In: Pro-ceedings of INCOPED 3rd International Cocoa Pests and Diseases Seminar, 16-17 October 2000, Kota Kinabalu, Sabah, Malaysia. pp. 114-122.

1674. Opoku, I. Y.; joint author (2003). Management of Phytophthora pod rot disease on cocoa farms in Ghana, by A. Y. Akrofi, A. A. Ap-piah and I. Y Opoku, Crop Protection 22: 469-477.

1675. Opoku, I. Y.; joint (2003). Control of Phytophthora megakarya dis-eases of cocoa with phosphonic acid. Final Technical Report, DFID project R7326, Crop Protection Research Programme, by M. Hold-erness, K. Holmes, I. Opoku, A. Akrofi, G. Asante, J. Boafo, J. Takrama, B. King and J. Cox.. 142p.

1676. Opoku, I. Y.; joint author (2004). Natural occurrence and distribution of stem cankers caused by Phytophthora megakarya and Phy-tophthora palmivora on cocoa, by A. A. Appiah, I. Y. Opoku and A. Y. Akrofi. European Journal of Plant Pathology 110: 983–990.

1677. Opoku, I. Y.; joint author (2005). Effects of two herbicides and four fungicides on insect pollination of cocoa, by J. E. Sarfo, B. Padi, F. K. Oppong, I. Y. Opoku and A. Y. Akrofi, In: Proceedings,

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14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 1349-1352.

1678. Opoku, I. Y.; joint author (2005). The spread of Phytophthora megakarya in Ghana: Implications for disease management, by A. Y. Akrofi and I. Y. Opoku. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, Accra, Ghana, 2003. pp. 1353-1358.

1679. Opoku, I. Y.; joint author (2006). Cocoa population breeding ap-proaches in Ghana, by Y. Adu-Ampomah, B. Adomako and I. Y. Opoku, In: Final Report of the CFC/ICCO/IPGRI Project on Cocoa Germplasm Utilization and Conservation: A Global Approach (1998-2004), edited by A. B. Eskes and Y. Efron. Amsterdam, CFC; Lon-don, ICCO, Rome, IPGRI. pp. 41-46.

1680. Opoku, I. Y.; joint author (2006). Prospects of biological control of the cocoa mirid Sahlbergella singularis Sahl. (Heteroptera) in Ghana: Field surveys for entomopathogens and laboratory bioassays with Beauveria bassiana isolates, by J. B. Ackonor, I. Y. Opoku, G. Oduor, G. Ignas and A. Nkansah. Papua New Guinea Journal of Agriculrure Forestry and Fisheries 49: 7-11.

1681. Opoku, I. Y.; joint author (2007). Meeting farmers’ demands: Produc-tion and supply of safe planting materials from Phytophthora megakarya affected cocoa seed gardens in Ghana, by A. Y. Akrofi, I. Y. Opoku and M. Assuah. In: Proceedings of INCOPED 5th International Cocoa Pests and Diseases Seminar, 2006, San Jose, Costa Rica. pp. 79-85.

1682. Opoku, I. Y.; joint author (2007). Report on an unusual attack on co-coa by a defoliator, Anomis leona Schaus (Coleoptera: Noctuidae), in Ghana, by J. E. Sarfo and I. Y. Opoku. 5th International Cocoa Pests and Diseases Seminar, 16th -17th October, 2006, Costa Rica. pp. 114-117

1683. Opoku S. Y. (2005). Farm Survey and Assessment of Genetic Diversity in Cocoa Germplasm Collections of Ghana using Molecular Mark-ers. M. Phil. Thesis, University of Ghana, Legon, Accra.

1684. Opoku S. Y.; Bhattacharjee, R.; Kolesnikova-Allen, M.; Enu-Kwesi L.; Asante, E. G.; Adu-Ampomah, Y. (2006). Impact of breeders’ collection on cocoa plantings of Ghana: Assessment by molecular marker analysis and farmers’ field survey. Journal of the Ghana Science Association 8(2):1–12.

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1685. Opoku S. Y.; Bhattacharjee, R.; Kolesnikova-Allen, M.; Motamayor, J.C.; Schnell, R.; Ingelbrecht, I.; Enu-Kwesi, L.; Adu-Ampomah, Y. (2007). Genetic diversity in cocoa (Theobroma cacao, L.) germplasm collection from Ghana. Journal of Crop Improvement 20: 73 – 87.

1686. Opoku, S. Y.; Kolesnikova-Allen, M.; Asante, E. G.; Adu-Ampomah, Y. (In press). Profile of cocoa planting materials in Ghana cocoa farms. INGENIC Newsletter

1687. Opoku-Ameyaw, K.; Amoah, F. M.; Acheampong, K.; Agyeman-Dwomoh, E.; Assuah, M. K.; Swatson, E.; Osei-Akoto, S. (2006). Cashew production guide. Accra, Ghana, Crop Services Direc-torate, Ministry of Food and Agriculture. 35p.

1688. Opoku-Ameyaw, K.; Amoah, F. M.; Oppong, F. K.; Agene, V. (2007). Determination of optimum age for transplanting cashew (Anacardium occidentale) seedlings in northern Ghana. African Journal of Agricultural Research 2: 296-299.

1689. Opoku-Ameyaw, K.; Amoah, F. M.; Yeboah, J. (2002). Studies into vegetative propagation on the sheanut (Vitellaria paradoxa Gaernt) tree. Journal of the Ghana Science Association 4(2): 138-145.

1690. Opoku-Ameyaw, K.; Appiah, M. R. (2000). Improving the growth of cashew (Anacardium occidentale) seedlings interplanted into ma-ture sheanut stands in northern Ghana. Ghana Journal of Agricul-tural Science 33: 159-164.

1691. Opoku-Ameyaw, K.; Appiah, M. R.; Ofori-Frimpong, K.; Afrifa, A. A. (2002). The response of cocoa yield to fertilizer under different farm maintenance practices. In: Managing Soils for Sustainable Production of Food and Industrial Crops: Proceedings of the 16th

Annual General Meeting of the Soil Science Society of Ghana, 1999. pp. 105-112.

1692. Opoku-Ameyaw, K.; Harris, P. M. (2001). Intercropping potatoes in early spring in a temperate climate: 1. Yield and intercropping ad-vantages. Potato Research 44: 53-61.

1693. Opoku-Ameyaw, K.; Harris, P. M. (2001). Intercropping potatoes in early spring in a temperate climate: 2. Radiation utilization. Potato Research 44: 61-74.

1694. Opoku-Ameyaw, K.; Harris, P. M. (2001). Intercropping potatoes in early spring in a temperate climate: 3. The influence of planting

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date, row width and temperature change on the potential for inter-cropping. Potato Research 44: 75-85.

1695. Opoku-Ameyaw, K.; Oppong, F. K.; Amoah, F. M.; Osei-Bonsu, K. (1999). Preliminary investigations into the use of inter-cropping for weed management in young coffee in Ghana. In: Proceedings of the 18th International Scientific Colloquium on Coffee, 1999, Hel-sinki, Finland. Paris, ASIC. pp. 441-444.

1696. Opoku-Ameyaw, K.; Oppong, F. K.; Ofori-Frimpong, K.; Amoah, F. M; Osei-Bonsu, K. (2003). Intercropping Robusta coffee with some edible crops in Ghana: agronomic performance and eco-nomic returns. Ghana Journal of Agricultural Science 36: 13-21.

1697. Opoku-Ameyaw, K.; Osei-Bonsu, K.; Ofori-Frimpong, K.; Acheampong, K. (2005). Biological and economic evaluation of some cocoa/food crop intercropping packages at establishment. In: Proceedings, 14th International Cocoa Research Conference, Ac-cra, Ghana, 2003. pp. 523-529.

1698. Opoku-Ameyaw, K.; Owusu, G. K. (2000). The state of sheanut re-search in Ghana. In: Proceedings of the1st Regional Conference on the shea butter tree (Vitellaria paradoxa subspecies. nilotica) for Eastern and Central Africa, 2000, Lira, Uganda. pp. 43-57.

1699. Opoku-Ameyaw, K.; joint author (1989). Coffee seed germination 1. Effect of ripening and processing on coffee (Coffea canephora) seed germination, by K. Osei-Bonsu, K. Opoku-Ameyaw, F. M. Amoah and K. Acheampong. Café, Cacao, Thé 33: 219-222.

1700. Opoku-Ameyaw, K.; joint author (1992). An analysis of rice-based farming systems in Valderrama, Antique, The Philippines, by R. Arano, S. Dondene, K. Opoku-Ameyaw, O. Puginier, N. Shrestha, C. Sumande and F. Turay. Wageningen, the Netherlands, ICRA. 94p. (ICRA Working Document Series 23).

1701. Opoku-Ameyaw, K.; joint author (1995). Agricultural land use in erod-ing uplands: A case study in the Philippines, by S. Dondeyne, K. Opoku-Ameyaw, O. Puginier and C. Sumande.Tropicultura 13: 25-31.

1702. Opoku-Ameyaw, K.; joint author (1998). Evaluation of Basta (Glufosi-nate ammonium) for weed control in coffee, by F. K. Oppong, K. Osei-Bonsu, F. M. Amoah and K. Opoku-Ameyaw. Journal of the Ghana Science Association; 1: 60-68.

1703. Opoku-Ameyaw, K.; joint author (1999). Evaluation of bare-root method for transplanting cocoa seedlings, by F. M. Amoah, K.

177

Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong. Ghana Jour-nal of Agricultural Science 32: 69-77.

1704. Opoku-Ameyaw, K.; joint author (1999). The effect of time of plant-ing at stake on cocoa seedling survival, by F. K. Oppong, K. Opoku-Ameyaw, K. Osei-Bonsu, F. M. Amoah, K. M. Brew and K. Acheampong. Ghana Journal of Agricultural Science 32: 79-86.

1705. Opoku-Ameyaw, K.; joint author (2000). Sustainable cocoa produc-tion in Ghana through soil fertility management, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa, E. G. Asante, K. Opoku-Ameyaw and J. B. Danquah. : Margaret Opferkuch Award for Best Innovation in the Cocoa Industry in Ghana for the year 2000. 27p.

1706. Opoku-Ameyaw, K.; joint author (2001) The effect of seedling age on the survival rate of transplanted bare-rooted cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K Op-pong. In: Proceedings, 13th International Cocoa Research Confer-ence, Kota Kinabalu, Malaysia, 2000. pp. 1215-1219.

1707. Opoku-Ameyaw, K.; joint author (2002). Cocoa-coconut intercropping in Ghana: agronomic and economic perspectives, by K. Osei-Bonsu, K. Opoku-Ameyaw, F. M. Amoah and F. K. Oppong. Agroforestry Systems 55(1): 1-8.

1708. Opoku-Ameyaw, K.; joint author (2002). The effect of spatial ar-rangement on the growth, yield and management practices of Ro-busta coffee (Coffea canephora) in Ghana, by F. M. Amoah, K. Osei-Bonsu, F. K. Oppong and K. Opoku-Ameyaw, Tropical Science 42: 656-662.

1709. Opoku-Ameyaw, K.; joint author (2005). Managing weeds in coffee and cocoa plantations, by F. K. Oppong, K. Opoku-Ameyaw, K. Osei-Bonsu and F. M. Amoah. Journal of the Ghana Science As-sociation (In Press)

1710. Opoku-Ameyaw, K.; joint author (2005). The effect of mulch on the establishment and early yield of cocoa, by F. M. Amoah, K. Osei-Bonsu, F. K. Oppong, K. Opoku-Ameyaw and K. Ofori-Frim-pong. In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 1301-1308.

1711. Opoku-Ameyaw, K.; joint author (2005). The effect of seedling age at transplanting on the growth and early yield of bare-root cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong. In: Proceedings, 14th International Cocoa Re-search Conference, Accra, Ghana, 2003. pp. 1309-1314.

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1712. Opoku-Ameyaw, K.; joint author 2005). The establishment and early yield of cocoa interplanted in oil palm plantation, by F. M. Amoah, B. N. Nuertey, F. K. Oppong, K. Osei-Bonsu, K. Opoku-Ameyaw, and T. E. O. Asamoah. Journal of the Ghana Sci-ence Association 8: 124-131.

1713. Opoku-Ameyaw, K.; joint author (2006). Sustainable cocoa produc-tion in Ghana through soil fertility management, by M. R. Appiah, K. Ofori-Frimpong, A. A. Afrifa and K. Opoku-Ameyaw. In: Proceedings of the International Conference on Managing Soil Re-sources of the Tropics for Sustainable Agricultural Productivity and Annual General Meeting of the Soil Science Society of Ghana. 17/18: 121-129.

1714. Opoku-Ameyaw, K.; joint author (2007). Comparison of Cocoa Re-search Institute of Ghana recommendations and traditional farmer methods on cocoa establishment, by F. K. Oppong, E. G. As-ante, K. Opoku-Ameyaw, E. A. Dwomoh, K. Ofori-Frimpong and A. Osei-Wusu. In: Proceedings, 15th International Cocoa Re-search Conference, San Jose, Costa Rica, 2006. pp. 273-280.

1715. Opoku-Ameyaw, K.; joint author (2007). Comparison of methods of field planting on cocoa seedling survival and early growth in a mar-ginal cocoa-growing area of Ghana, by F. K. Oppong and K. Opoku-Ameyaw. Ghana Journal of Agricultural Science 40(2): 199-205.

1716. Opoku-Ameyaw, K.; joint author (2007). Drying process and Ghana-ian green coffee quality. 1. Crude protein, pH and Caffeine levels, by S. T. Lowor, F. M. Amoah and K. Opoku-Ameyaw. African Journal of Agricultural Research 2: 698-699.

1717. Opoku-Ameyaw, K.; joint author (2007). Investigations into the criti-cal period of weed competition in young Theobroma cacao L., by F. K. Oppong, K. Opoku-Ameyaw, K. Ofori-Frimpong and F. Owusu-Ansah. In: Proceedings, 15th International Cocoa Re-search Conference, San Jose, Costa Rica, 2006. pp. 281-290.

1718. Opoku-Ameyaw, K.; joint author (2007). Locational and maturity ef-fects on cashew tree gum production in Ghana, by E. Gyedu-Akoto, I. Oduro, F. M. Amoah, J. H. Oldham, W. O. Ellis, K. Opoku-Ameyaw and R. B. Hakeem. Scientific Research and Es-say 2(11): 499-501.

1719. Opoku-Ameyaw, K.; joint author (2007). Rheological properties of aqueous cashew tree gum solutions, by E. Gyedu-Akoto, I. Oduro, F. M. Amoah, J. H. Oldham, W. O. Ellis and K. Opoku-Ameyaw. Scientific Research and Essay 2(10): 458-461.

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1720. Opoku-Ameyaw, K.; joint author (2008). Physico-chemical properties of cashew tree gum, by E. Gyedu-Akoto, I. Oduro, F. M. Amoah, J. H. Ellis, W. O. Oldham, K. Opoku-Ameyaw and R. B. Hakeem. African Journal of Food Science 2(5): 60-64.

1721. Opoku-Ameyaw, K.; joint author (2008). Quality estimation of cashew gum in the production of chocolate pebbles, by E. Gyedu-Akoto, I. Oduro, F. M. Amoah, J. H. Oldham, W. O. Ellis, K. Opoku-Ameyaw, F. Asante and S. Bediako. African Journal of Food Sci-ence 2(2): 16-20.

1722. Opoku-Ameyaw, K.; joint author (In press). Determining the critical period of weed competition in young clonal Robusta coffee in Ghana, by F. K. Oppong, K. Opoku-Ameyaw and Owusu-Ansah, F. In: Proceedings of the 22nd International Scientific Collo-quium on Coffee , Campinas, SP-Brazil, 14-19 September 2008.

1723. Oppong, F. K. (2005). Triasulfuron inhibition of Vicia faba. Journal of the Ghana Science Association 7: 47-55.

1724. Oppong, F. K.; Appiah, M. R.; Osei-Bonsu, K.; Amoah, F. M. (2002). The movement and persistence of triclopyr (Garlon 2) in some Ghanaian cocoa growing soils. In: Managing Soils for Sustain-able Production of Food and Industrial Crops: Proceedings of the 16th Annual General Meeting of the Soil Science Society of Ghana, 1999. pp. 49-56.

1725. Oppong, F. K.; Asante, E. G.; Opoku-Ameyaw, K.; Dwomoh, E. A.; Ofori-Frimpong, K.; Osei-Wusu, A. (2007). Comparison of Cocoa Research Institute of Ghana recommendations and tradi-tional farmer methods on cocoa establishment. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006 pp. 273-280.

1726. Oppong, F. K.; Asante, E. G.; Osei-Bonsu, K.; Acheampong, K.; Amoah, F.M. (2005) Agronomic and economic evaluation of differ-ent weed management options in young cocoa. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 291-301

1727. Oppong. F. K., Ofori-Frimpong, K.; Fiakpornu, R. (2007). Effects of polybag size and foliar application of urea on cocoa seedling growth. Ghana Journal of Agricultural Science 40(2): 207-213.

1728. Oppong, F. K.; Opoku-Ameyaw, K. (2007). Comparison of methods of field planting on cocoa seedling survival and early growth in a

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marginal cocoa-growing area of Ghana. Ghana Journal of Agricul-tural Science 40(2): 199-205.

1729. Oppong, F. K.; Opoku-Ameyaw, K.; Ofori-Frimpong, K.; Owusu-Ansah, F. (2007). Investigations into the critical period of weed competition in young Theobroma cacao L. In: Proceedings, 15th In-ternational Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 281-290.

1730. Oppong, F. K.; Opoku-Ameyaw, K.; Osei-Bonsu, K.; Amoah, F. M. (In press). Managing weeds in coffee and cocoa plantations. Journal of the Ghana Science Association.

1731. Oppong, F. K.; Opoku-Ameyaw, K.; Osei-Bonsu, K.; Amoah, F. M.; Brew, K. M.; Acheampong, K. (1999). The effect of time of planting at stake on cocoa seedling survival. Ghana Journal of Agri-cultural Science 32: 79-86.

1732. Oppong, F. K.; Opoku-Ameyaw, K.; Owusu-Ansah, F. (In press). Determining the critical period of weed competition in young clonal Robusta coffee in Ghana. In: Proceedings of the 22nd Interna-tional Scientific Colloquium on Coffee, Campinas, SP-Brazil, 14-19 September 2008.

1733. Oppong, F. K.; Osei-Bonsu K.; Amoah, F. M. (1990). Evaluation of the use of herbicides for weed control in cocoa and coffee planta-tions in Ghana. In: Proceedings of the 3rd Tropical Weed Science Conference, 1990. Kuala Lumpur, Malaysian Plant Protection Soci-ety. pp. 139-144.

1734. Oppong, F. K.; Osei-Bonsu, K.; Amoah, F. M. (1994). Effects of density and slashing of Chromolaena odorata on the growth of young cocoa seedlings. In: Proceedings, 11th International Cocoa Research Conference, Yamoussoukro, Republique de Côte d’Ivoire, 1993. pp. 941-945.

1735. Oppong, F. K.; Osei-Bonsu, K.; Amoah, F. M. (1999). The efficacy of low volume application of Roundup (Glyphosate) on weed sup-pression in some plantation crops in Ghana. Journal of the Ghana Science Association (Special Edition) 2(3): 40-48.

1736. Oppong, F. K.; Osei-Bonsu K.; Amoah F. M. (2003). The seed bank of weed species in three ecosystems in a semi-deciduous forest zone in Ghana. Tropical Science 43: 80-85.

1737. Oppong, F. K., Osei-Bonsu K.; Amoah F. M. (2007). Appraisal of some methods of weed control during initial establishment of co-coa in a semi-deciduous forest zone of Ghana. Ghana Journal of Agricultural Science 40: 67-72.

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1738. Oppong, F. K.; Osei-Bonsu K.; Amoah F. M.; Acheampong K. (1997). Effectiveness of Glyphosate in controlling weeds during co-coa establishment. In: Proceedings of the 1st International Cocoa Pests and Diseases Seminar, Accra, Ghana, 1995. pp. 280-285.

1739. Oppong, F. K.; Osei-Bonsu, K.; Amoah, F. M.; Acheampong, K. (1998). Potential use of Flemingia macrophylla as mulch for man-aging weeds in young cocoa in Ghana. Ghana Journal of Agricul-tural Science 31: 67-72.

1740. Oppong, F. K.; Osei-Bonsu, K.; Amoah, F. M.; Opoku-Ameyaw, K. (1998). Evaluation of Basta (Glufosinate ammonium) for weed control in coffee. Journal of the Ghana Science Association 1(1): 60-68.

1741. Oppong, F. K.; Osei-Bonsu, K.; Ofori-Frimpong, K. (2005). Resid-ual effects of oxyfluorfen on cocoa seedlings and its mobility in co-coa-growing soil. Journal of the Ghana Science Association (In Press)

1742. Oppong, F. K.; Sagar, G. R. (1992). Degradation of triasulfuron in soil under laboratory conditions. Weed Research 32: 167-173.

1743. Oppong, F. K.; Sagar, G. R. (1992). The activity and mobility of triasul-furon in soil as influenced by organic matter, duration amount and frequency of rain. Weed Research 32: 157-165.

1744. Oppong, F. K.; Sarfo J. E.; Osei-Bonsu K.; Amoah F. M. (2006). Effects of sulfosate on weed suppression, cocoa pod set, and yield of cocoa and coffee. Ghana Journal of Agricultural Science 39(2): 115-122.

1745. Oppong, F. K.; joint author (1993). Effect of the stage of ripening and frequency of harvesting on the quality of Robusta coffee in Ghana, by K. Osei-Bonsu, F. M. Amoah and F. K. Oppong. Paper pre-sented at the 18th Biennial Conference of the Ghana Science Asso-ciation, 1993, Legon, Accra, Ghana.

1746. Oppong, F. K.; joint author (1993). Effect of time of harvesting on yield and harvest quality of Robusta coffee, by K. Osei-Bonsu, F. M. Amoah, F. K. Oppong and F. S. Gyampoh. In: Proceedings of the 15th International Scientific Colloquium on Coffee, Montpel-lier, France, 1993. Paris, ASIC. pp. 803-806.

1747. Oppong, F. K.; joint author (1995). Under-planting oil palm with cocoa in Ghana, by F. M. Amoah, B. N. Nuertey, K. Baidoo-Addo, F.

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K. Oppong, K. Osei-Bonsu, and T. E. O. Asamoah. Agro-forestry Systems 28: 1-11.

1748. Oppong, F. K.; joint author (1996). Responses of improved Robusta coffee to location and management practices in Ghana, by F. M. Amoah, K. Osei-Bonsu and F. K. Oppong. Experimental Agri-culture 33: 103-111.

1749. Oppong, F. K.; joint author (1996). Shea (Vitellaria paradoxa) inter-cropping systems in northern Ghana: effect of cultural practices and crop combinations on the performance of shea seedlings, by K. Osei-Bonsu, M. R. Appiah, F. M. Amoah and F. K. Oppong. Ghana Journal of Agricultural Science 29: 3-8.

1750. Oppong, F. K.; joint author (1997). Appraisal of methods for the eradi-cation of cocoa swollen shoot virus-infected cocoa trees, by K. Osei-Bonsu, S. T. Ampofo, F. K. Oppong and F. M. Amoah. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 213-217.

1751. Oppong, F. K.; joint author (1997). The effect of shade, stem number and spacing on Robusta coffee yield in Ghana, by F. M. Amoah, K. Osei-Bonsu and F. K. Oppong. In: Proceedings of the 17th In-ternational Scientific Colloquium on Coffee, 1997, Nairobi, Kenya. Paris, ASIC. pp. 528-534.

1752. Oppong, F. K.; joint author (1998). The establishment and early yield of cocoa intercropped with food crops in Ghana, by K. Osei-Bonsu, F. M. Amoah, F. K. Oppong. Ghana Journal of Agricul-tural Science 31: 45-53.

1753. Oppong, F. K.; joint author (1999). Economic evaluation of shea (Vitellaria paradoxa) food intercropping systems in northern Ghana, by K. Osei-Bonsu, E. G. Asante, M. R. Appiah, F. M. Amoah and F. K. Oppong. Journal of the Ghana Science Associa-tion (Special edition) 2(3): 70-80.

1754. Oppong, F. K.; joint author (1999). Evaluation of bare-root method for transplanting cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong. Ghana Journal of Agricultural Science 32: 69-77.

1755. Oppong, F. K.; joint author (1999). Evaluation of the initial perfor-mance of multiple stands of hybrid cocoa in Ghana, by K. Osei-Bonsu, F. K. Oppong, F. M. Amoah and K. Acheampong. In: Proceedings, 12th International Cocoa Research Conference, Sal-vador, Bahia, Brazil, 1996. pp.361-366.

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1756. Oppong, F. K.; joint author (1999). Preliminary investigations into the use of inter-cropping for weed management in young coffee in Ghana, by K. Opoku-Ameyaw, F. K. Oppong, F. M. Amoah and K. Osei-Bonsu. In: Proceedings of the 18th International Scientific Colloquium on Coffee, 1999, Helsinki, Finland. Paris, ASIC. pp. 441-444.

1757. Oppong, F. K.; joint author (1999). The effect of shade and spacing on the growth and yield of improved Robusta coffee (Coffea canephora) in Ghana, by F. M. Amoah, K. Osei-Bonsu and F. K. Oppong. Journal of the Ghana Science Association 2: 109-113.

1758. Oppong, F. K.; joint author (1999). The response of some cocoa hy-brids to density and pruning, by K. Osei-Bonsu, F. M. Amoah, F. K. Oppong and R. S. Amonoo. In: Proceedings, 12th Interna-tional Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 361-366.

1759. Oppong, F. K.; joint author (2001). Screening of some leguminous plants for soil fertility improvement and weed management during cocoa establishment, by K. Ofori-Frimpong, F. K. Oppong, M. R. Appiah and A. A. Afrifa. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Malaysia, 2000. pp. 1277-1286.

1760. Oppong, F. K.; joint author (2001). The effect of seedling age on the survival rate of transplanted bare-rooted cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Malaysia, 2000. pp. 1215-1219.

1761. Oppong, F. K.; joint author (2002). Cocoa-coconut intercropping in Ghana: agronomic and economic perspectives, by K. Osei-Bonsu, K. Opoku-Ameyaw, F. M. Amoah and F. K. Oppong. Agro-forestry Systems 55(1): 1-8.

1762. Oppong, F. K.; joint author (2002). The effect of spacing and shade on coffee growth and yield on hill tops in an oil palm plantation, by F. M. Amoah, B. N. Nuertey, K. Osei-Bonsu, F. K. Oppong, E. Marfo-Ahenkora and T. E. O. F. Asamoah. Journal of the Ghana Sci-ence Association 4: 73-79.

1763. Oppong, F. K.; joint author (2002). The effect of spatial arrangement on the growth, yield and management practices of Robusta coffee (Coffea canephora) in Ghana, by F. M. Amoah, K. Osei-Bonsu,

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F. K. Oppong and K. Opoku-Ameyaw. Tropical Science 42: 656-662.

1764. Oppong, F. K.; joint author (2003). Intercropping Robusta coffee with some edible crops in Ghana: agronomic performance and eco-nomic returns, by K. Opoku-Ameyaw, F. K. Oppong, K. Ofori-Frimpong, F. M. Amoah and K. Osei-Bonsu. Ghana Journal of Agricultural Science 36: 13-21.

1765. Oppong, F. K.; joint author (2004). Effect of pre-treatment and geno-type of kola (Cola nitida (Vent) Schott and Endlicher) nuts on ger-mination, growth and early yield, by G. J. Anim-Kwapong, A. Ab-dul-Karimu and F. K. Oppong. Tropical Agriculture 82: 105-111.

1766. Oppong, F. K.; joint author (2005). Effects of two herbicides and four fungicides on insect pollination of cocoa, by J. E. Sarfo, B. Padi, F. K. Oppong, I. Y. Opoku and A. Y. Akrofi. In: Proceedings, 14th International Cocoa Research Conference Accra, Ghana, 2003. pp. 1349-1352.

1767. Oppong, F. K.; joint author (2005). The effect of mulch on the estab-lishment and early yield of cocoa, by F. M. Amoah, K. Osei-Bonsu, F. K. Oppong, K. Opoku-Ameyaw and K. Ofori-Frim-pong, In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 1301-1308.

1768. Oppong, F. K.; joint author (2005). The effect of seedling age at transplanting on the growth and early yield of bare-root cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong.Procedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp.1309-1314.

1769. Oppong, F. K.; joint author (2005). The establishment and early yield of cocoa interplanted in oil palm plantation, by F. M. Amoah, B. N. Nuertey, F. K. Oppong, K. Osei-Bonsu, K. Opoku-Ameyaw, and T. E. O. Asamoah. Journal of the Ghana Science Association 8: 124-131.

1770. Oppong, F. K.; joint author (2006). Income intensification strategy: Determination of the optimum time to underplant oil palm with co-coa, by B. N. Nuertey, F. M. Amoah, A. Opoku, T. E. O. Asamoah, F. K. Oppong, K. Osei-Bonsu and E. Marfo-Ahenkora. Journal of the Ghana Science Association 8: 26-37.

1771. Oppong, F. K.; joint author (2007). Determination of optimum age for transplanting cashew (Anacardium occidentale) seedlings in north-ern Ghana, by K. Opoku-Ameyaw, F. M. Amoah, F. K. Oppong and V. Agene. African Journal of Agricultural Research 2: 296-299.

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1772. Oppong, F. K.; joint author (2007). Effect of weed control methods on some soil properties of newly planted cocoa farm, by K. Ofori-Frimpong, A. A. Afrifa, F.K Oppong and M. R. Appiah. Ghana Journal of Agricultural Science 40(2): 127-133.

1773. Oppong, F. K.; joint author (In press). Evaluation of some Robusta coffee (Coffea canephora Pierre Ex A. Froehner) clones for high density planting in Ghana, by G. J. Anim-Kwapong, Esther Anim-Kwapong and F. K. Oppong. In: Proceedings of the 22nd

International Scientific Colloquium on Coffee, Campinas, SP-Brazil, 14-19th September 2008.

1774. Oppong, F. K.; joint author (In Press). Microbial biomass and ex-tractable N and P contents of soils under different weed control methods in cocoa plantation. Paper presented at the 17th Annual General Meeting of the Soil Science Society of Ghana, Tamale, Ghana, 26th February-2nd March 2001, by K. Ofori-Frimpong, M. R. Appiah, A. A. Afrifa and F. K. Oppong.

1775. Oppong, Helena; Gyedu, Esther. (1999). Development of cocoa powder based pastries in Ghana. In: Proceedings, 12th Interna-tional Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.1027-1031.

1776. Oppong, Helena; joint author (1996). Production of cocoa by-products from fresh cocoa pod wastes and non-traditional products from co-coa beans. D. Adomako, E. O. Amaning, C. K. Agyente-Badu, J. Takrama, Helena Oppong and Esther Gyedu. Cocoa Re-search Institue, Ghana. Technical Bulletin, no.14. 34p.

1777. Oppong, Helena; joint author (1998) (1998). Utilization of cocoa by-products for nutrition, body care and food supply. Paper presented at the 9th Meeting of the Advisory Group on the World Cocoa Econ-omy, 25-30 May, 1998, Valencia, Spain, organised by The Interna-tional Cocoa Organisation, by D. Adomako, E. Osei-Amaning, C. K. Agyente-Badu, E.G. Asante, Esther Gyedu, Helena Op-pong and J. Takrama. London, ICCO. 13p.

1778. Oppong, Helena; joint author (1999). Pilot plants to process cocoa by-products in Ghana: Revised production cost analysis, by D. Ado-mako, E. Osei-Amaning, C. K. Agyente-Badu, J. F. Takrama and H. Oppong. Tafo, Cocoa Research Institute, Ghana. 32p.

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1779. Oppong, Helena, joint author (1999). Pilot-scale production of cocoa pod husk ash for the soft soap industry in Ghana, by D. Adomako, Helena Oppong, Esther Gyedu, A. K. Tuah, R. E. Dodoo and F. K. N. Hanson. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.1021-1026.

1780. Osei, J. K. (1978) Fruit setting, inheritance of nut colour, germination and early seedling growth of kola (Cola nitida (Vent.) Schott and Engl.) M. Sc. Thesis, Crop Science, University of Ghana, Legon, Ac-cra, Ghana. 58p.

1781. Osei, J. K. (1995/96). Fruit setting from natural pollination and the yield of nine-year old cross-compatible Cola nitida clones. Ghana Journal of Agricultural Science 28/29: 95-97.

1782. Osei, S. A.; Atuahene, C. C.; Heathcote, D.; Frimpong, E. B.; Ado-mako, D. (1991). Cocoa pod-and-husk meal as a feed ingredient in layer diets. Animal Feed Science and Technology 35: 283-288.

1783. Osei-Amaning, E. (1996). Management of Vitellaria paradoxa in Guinea savanna rangelands in Ghana. Ph. D. Thesis, University of Wales, Bangor, Wales, U. K. 203p.

1784. Osei-Amaning, E.; Hall, J. B.; Aebischer, D. P.; Tomlinson, H. F.; Hin-dle, J. R. (1996). Vitellaria paradoxa: A Monograph. University of Wales, Bangor, U. K., School of Agriculture and Forest Sciences Publication, No. 8. 105p.

1785. Osei-Amaning, E.; Tuah, A.K.; Abu, E. K.; Frimpong, E. B.; Ado-mako, D. (1994). The performance of growing Djallonke lambs fed feed containing different levels of cocoa pod husk, 10% NaOH-treated corn cobs and sundried caged layer manure. In: Proceed-ings, 11th International Cocoa Research Conference, Yamous-soukro, Republique de Cote Côte d’Ivoire. 1993. pp.791-796.

1786. Osei-Amaning, E.; Tuah, A. K.; Adomako, D.; Frimpong, E. B. (1990). The performance of West African shorthorn breed of cattle grazing under sheanut trees in the Bole district in the Guinea Sa-vannah zone of Ghana. In: Proceeding of the 1st African Small Ru-minants Research Networks Conference, 1990, Nairobi, Kenya. pp. 35-39.

1787. Osei-Amaning, E.; joint author (1989). The productivity of cattle raised under sheanut trees in the Bole District of the Northern Re-

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gion - A preliminary report, by A. K. Tuah, E. Osei-Amaning, D. Adomako and E. B. Frimpong. In: Proceedings of the 19th Animal Science Symposium, Kumasi, Ghana. pp. 121-124.

1788. Osei-Amaning, E.; joint author (1996). Livestock feeding trials with cocoa pod husk in Ghana, by D. Adomako and E. Osei-Amaning. Cocoa Research Institute, Ghana. Technical Bulletin, no. 13. Tafo, Ghana, CRIG. 23p.

1789. Osei-Amaning, E.; joint author (1996). Production of cocoa by-products from fresh cocoa pod wastes and non-traditional products from cocoa beans, by D. Adomako, E. Osei-Amaning, C. K. Agyente-Badu, J. Takrama, Helena Oppong and Esther Gyedu. Cocoa Research Institute, Ghana. Technical Bulletin, no.14, Tafo, Ghana, CRIG. 34p.

1790. Osei-Amaning, E.; joint author (1998). Utilization of cocoa by-prod-ucts for nutrition, body care and food supply. Paper presented at the 9th Meeting of the Advisory Group on the World Cocoa Econ-omy, 25-30 May, 1998, Valencia, Spain, organised by The Interna-tional Cocoa Organisation, by D. Adomako, E. Osei-Amaning, C. K. Agyente-Badu, E.G. Asante, Esther Gyedu, Helena Op-pong and J. Takrama. London, ICCO. 13p.

1791. Osei-Amaning, E.; joint author (1999). Compound animal feeds based on cocoa pod husk, by D. Adomako, E. Osei-Amaning and E. G. Asante. Tropical Science 39: 120-123.

1792. Osei-Amaning, E.; joint author (1999). Effect of diets containing varying levels of cocoa pod husk (CPH) and NaOH-treated corn cob on the reproductive performance of confined Djallonke sheep, by D. Adomako, A. K. Tuah, F.Y. Obese, S. A. Osei, D. B. Okai, E. B. Frimpong, and E. Osei-Amaning. In: Proceedings, 12th Interna-tional Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.1047-1052.

1793. Osei-Amaning, E.; joint author (1999). Pilot plants to process cocoa by-products in Ghana: Revised production cost analysis, by D. Adomako, E. Osei-Amaning, C. K. Agyente-Badu, J. F. Takrama and H. Oppong, Tafo, Cocoa Research Institute, Ghana. 32p.

1794. Osei-Bonsu, K. (2005). The cocoa plant ecosystem. In: Ghana Science Association 24th Biennial Conference. Plenary presentations 1st -4th

August, 2005. pp. 3-23.

1795. Osei-Bonsu, K. (2005). Sustainable multiple land-use through cocoa agroforestry – a review. Ghana Journal of Horticulture 4: 100-112.

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1796. Osei-Bonsu, K.; Acheampong, K.; Amoah, F.M. (2001). The effect of shade, variety and spacing on cocoa yield at the Cocoa Re-search Institute of Ghana (CRIG). In: Proceedings of the13th Inter-national Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 1223-1231.

1797. Osei-Bonsu, K.; Afrifa, M. K. (1987). The germination of colanut (Cola nitida (Ventenant) Schott and Endlicher). Ghana Journal of Agricultural Science 2: 20-33.

1798. Osei-Bonsu, K.; Afrifa, M. K.; Brown, D. A. (1987). Evaluation of different packaging materials for storage of cola nuts. In: Proceed-ings of the 13th Biennial Conference of the West African Science Association/15th Biennial Conference of the Ghana Science Associa-tion, 1987, Legon, Ghana. pp. 222-228.

1799. Osei-Bonsu, K.; Ameyaw Oduro, C.; Tetteh, J. P. (2005). Traditional cocoa agroforestry: 1. Species encountered in the cocoa ecosys-tem of a typical cocoa growing district in Ghana. Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 531-538.

1800. Osei-Bonsu, K.; Amoah, F. M.; Oppong, F. K. (1993). Effect of the stage of ripening and frequency of harvesting on the quality of Ro-busta coffee in Ghana. Paper presented at the 18th Biennial Confer-ence of the Ghana Science Association, 1993, Legon, Accra, Ghana.

1801. Osei-Bonsu, K.; Amoah, F. M.; Oppong, F. K. (1998). The establish-ment and early yield of cocoa intercropped with food crops in Ghana. Ghana Journal of Agricultural Science 31: 45-53.

1802. Osei-Bonsu, K.; Amoah, F. M.; Oppong, F. K.; Amonoo, R. S. (1999). The response of some cocoa hybrids to density and prun-ing. In: Proceedings, 12th International Cocoa Research Confer-ence, Salvador, Bahia, Brazil, 1996. pp. 361-366.

1803. Osei-Bonsu, K.; Amoah, F. M.; Oppong, F. K.; Gyampoh, F. S. (1993). Effect of time of harvesting on yield and harvest quality of Robusta coffee. In: Proceedings of the 15th International Scientific Colloquium on Coffee, Montpellier, France, 1993. Paris, ASIC. pp. 803-806.

1804. Osei-Bonsu, K.; Ampofo, S. T.; Amoah, F. M. (1989). Coffee seed germination. II The effects of some pre-treatments on coffee (Cof-fea canephora) seed germination. Café, Cacao, Thé 33: 223-228.

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1805. Osei-Bonsu, K.; Ampofo, S. T.; Oppong, F. K.; Amoah, F. M. (1997). Appraisal of methods for the eradication of cocoa swollen shoot virus-infected cocoa trees. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 213-217.

1806. Osei-Bonsu, K.; Anim-Kwapong, G. J. (1998). Preliminary evaluation of some forest trees for cocoa cultivation. Journal of the Ghana Sci-ence Association 1(1): 141-150.

1807. Osei-Bonsu, K.; Anim-Kwapong, G. J. (2004). State of the art and delivery of technologies in the Ghana cocoa industry. In: Proceed-ings of Workshop on the mechanisms for the transfer of technolo-gies to economic operators in the alliance countries, Ilheus, Brazil, 11-14 July 2004.

1808. Osei-Bonsu, K.; Anim-Kwapong, G. J. (2005). Mechanisms for the transfer of technology to economic operators in the cocoa industry in Ghana. Paper presented at a Workshop of the Cocoa Producers’ Alliance (COPAL) 11th – 14th July 2005, Kuala Lumpur, Malaysia.

1809. Osei-Bonsu, K.; Anim-Kwapong, G. J.; Amoah, F. M. (2000). Evalu-ation of some leguminous species for the establishment of Robusta coffee in Ghana. In: Proceedings of the 18th International Scientific Colloquium on Coffee, 1999, Helsinki, Finland. Paris, ASIC. pp. 438-440.

1810. Osei-Bonsu, K.; Appiah, M. R.; Amoah, F. M.; Oppong, S. K. (1996). Shea (Vitellaria paradoxa) intercropping systems in north-ern Ghana: effect of cultural practices and crop combinations on the performance of shea seedlings. Ghana Journal of Agricultural Science 29: 3-8.

1811. Osei-Bonsu, K.; Asante, E. G.; Appiah, M. R.; Amoah, F. M.; Op-pong, F. K. (1999). Economic evaluation of shea (Vitellaria para-doxa) food intercropping systems in northern Ghana. Journal of the Ghana Science Association (Special edition) 2(3): 70-80.

1812. Osei-Bonsu, K.; Baah, F.; Afrifa, A. A. (2001). Constraints of cocoa farming: Socio-economic perspectives. In: Proceedings of the Farmer Field School Curriculum Development Workshop. Tafo, CRIG. pp. 59-66.

1813. Osei-Bonsu, K.; Baah, F.; Afrifa, A.A. (2001). Evaluation of cocoa conditions, problems and possible solutions in four farming com-munities surrounding the Kakum Forest Reserve, Central Region, Ghana. A consulting report to Conservation International, Ghana. 25p.

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1814. Osei-Bonsu, K.; Baah, F.; Afrifa, A.A.; Amoako-Gyampah, G.; Osei-Wusu, Y. B (2005). The status of cocoa in the agrarian system of some rural communities surrounding the Kakum Forest Reserve, Ghana. In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 1017-1022.

1815. Osei-Bonsu, K.; Ollennu, L. A. A. (1990). Cocoa Research Institute interactions with extension personnel of CSD and cocoa/coffee farmers. In: Proceedings of the 1st Farming Systems Workshop, 1990. CRIG, Tafo, Ghana. pp.77-81.

1816. Osei-Bonsu, K.; Opoku-Ameyaw, K.; Amoah, F. M.; Acheampong K. (1989). Coffee seed germination 1. Effect of ripening and pro-cessing on coffee (Coffea canephora) seed germination. Café, Ca-cao, Thé 33: 219-222.

1817. Osei-Bonsu, K.; Opoku-Ameyaw, K.; Amoah, F. M.; Oppong, F. K. (2002). Cocoa-coconut intercropping in Ghana: agronomic and economic perspectives. Agroforestry Systems 55(1): 1-8.

1818. Osei-Bonsu, K.; Oppong, F. K.; Amoah, F. M.; Acheampong, K. (1999). Evaluation of the initial performance of multiple stands of hybrid cocoa in Ghana. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 361-366

1819. Osei-Bonsu, K.; joint author (1977). Yield and tree girth variability in some Cola nitida populations, by E. E. N. A. Bonaparte, K. Osei-Bonsu and M. K. Afrifa. Acta Horticulturae 53: 329-336.

1820. Osei-Bonsu, K.; joint author (1986). Evaluation of herbicides for use in coffee plantations, by S. T. Ampofo and K. Osei-Bonsu. Paper presented at the Ghana Weed Science Association Conference, 1986, Accra, Ghana.

1821. Osei-Bonsu, K.; joint author (1988). A practical guide for coffee ex-tension workers, by S. T. Ampofo and K. Osei-Bonsu. Tafo, Ghana, Cocoa Research Institute. 24p.

1822. Osei-Bonsu, K.; joint author (1988). Models for rehabilitating small scale cocoa farms in Ghana, by S. T. Ampofo and K. Osei-Bonsu. In: Proceedings, 10th International Cocoa Research Confer-ence, Santo Domingo, Dominican Republic, 1987. pp. 51-55.

1823. Osei-Bonsu, K.; joint author (1990). Evaluation of the use of herbi-cides for weed control in cocoa and coffee plantations in Ghana, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. In: Proceedings of the 3rd Tropical Weed Science Conference, 1990, Kuala Lumpur, Malaysia, Kuala Lumpur, Malaysian Plant Protection Society. pp. 139-144.

191

1824. Osei-Bonsu, K.; joint author (1994). Effects of density and slashing of Chromolaena odorata on the growth of young cocoa seedlings, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. In: Proceed-ings, 11th International Cocoa Research Conference, Yamous-soukro, Republique de Côte d’Ivoire, 1993. pp. 941-945.

1825. Osei-Bonsu, K.; joint author (1994). Effect of spacing and pruning on the initial establishment and yield of four cocoa varieties at the Co-coa Research Institute, by S. T. Ampofo and K. Osei-Bonsu. In: Proceedings, 11th International Cocoa Research Conference, Ya-moussoukro, Republique de Côte d’Ivoire, 1993. pp. 687-690.

1826. Osei-Bonsu, K.; joint author (1995). Under-planting oil palm with co-coa in Ghana, by F. M. Amoah, B. N. Nuertey, K. Baidoo-Addo, F. K. Oppong, K. Osei-Bonsu, and T. E. O. Asamoah. Agro-forestry Systems 28: 1-11.

1827. Osei-Bonsu, K.; joint author (1996). Responses of improved Robusta coffee to location and management practices in Ghana, by F. M. Amoah, K. Osei-Bonsu and F. K. Oppong. Experimental Agricul-ture 33: 103-111.

1828. Osei-Bonsu, K.; joint author (1997). Effectiveness of Glyphosate in controlling weeds during cocoa establishment, by F. K. Oppong, K. Osei-Bonsu, F. M. Amoah and K. Acheampong. In: Proceed-ings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 280-285.

1829. Osei-Bonsu, K.; joint author (1997). The effect of shade, stem number and spacing on Robusta coffee yield in Ghana, by F. M. Amoah, K. Osei-Bonsu and F. K. Oppong. In: Proceedings of the 17th In-ternational Scientific Colloquium on Coffee, 1997, Nairobi, Kenya. Paris, ASIC. pp. 528-534.

1830. Osei-Bonsu, K.; joint author (1998). Evaluation of Basta (Glufosinate ammonium) for weed control in coffee, by F. K. Oppong, K. Osei-Bonsu, F. M. Amoah and K. Opoku-Ameyaw. Journal of the Ghana Science Association 1(1): 60-68.

1831. Osei-Bonsu, K.; joint author (1998). Potential use of Flemingia macro-phylla as mulch for managing weeds in young cocoa in Ghana, by F. K. Oppong, K. Osei-Bonsu, F. M. Amoah and K. Acheam-pong. Ghana Journal of Agricultural Science 31: 67-72.

1832. Osei-Bonsu, K.; joint author (1999). Evaluation of bare-root method for transplanting cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong. Ghana Journal of Agricultural Science 32: 69-77.

192

1833. Osei-Bonsu, K.; joint author (1999). Preliminary investigations into the use of inter-cropping for weed management in young coffee in Ghana, by K. Opoku-Ameyaw, F. K. Oppong, F. M. Amoah and K. Osei-Bonsu. In: Proceedings of the 18th International Scientific Colloquium on Coffee; 1999, Helsinki, Finland. Paris, ASIC. pp. 441-444.

1834. Osei-Bonsu, K.; joint author (1999). The effect of shade and spacing on the growth and yield of improved Robusta coffee (Coffea canephora) in Ghana, by F. M. Amoah, K. Osei-Bonsu and F. K. Oppong. Journal of the Ghana Science Association 2: 109-113.

1835. Osei-Bonsu, K.; joint author (1999). The effect of time of planting at stake on cocoa seedling survival, by F. K. Oppong, K. Opoku-Ameyaw, K. Osei-Bonsu, F. M. Amoah, K. M. Brew and K. Acheampong. Ghana Journal of Agricultural Science 32: 79-86.

1836. Osei-Bonsu, K.; joint author (1999). The efficacy of low volume appli-cation of Roundup (Glyphosate) on weed suppression in some plantation crops in Ghana, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. Journal of the Ghana Science Association 2: 40-48.

1837. Osei-Bonsu, K.; joint author (2000). A survey of raw processing meth-ods for kolanuts, by Mercy Asamoah, K. Osei-Bonsu and K. Osei Sarkodie. Journal of the Ghana Science Association 2: 105-108.

1838. Osei-Bonsu, K.; joint author (2001). An outbreak of pink disease of cocoa in Ghana, by I. Y. Opoku, A. Y. Akrofi, K. Osei-Bonsu and K. Acheampong. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 761-768

1839. Osei-Bonsu, K.; joint author (2000). The use of gamma radiation for the preservation of kola nuts, by J. F. Takrama, J. E. Sarfo, P. C. Aculey, K. Osei-Bonsu, Kojo Montford and J. Nketsia-Tabiri. Jour-nal of the Ghana Science Association 2: 184-192.

1840. Osei-Bonsu, K.; joint author (2001). The effect of seedling age on the survival rate of transplanted bare-rooted cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Malaysia, 2000. pp. 1215-1222.

1841. Osei-Bonsu, K.; joint author (2002). The effect of spacing and shade on coffee growth and yield on hill tops in an oil palm plantation, by F. M. Amoah, B. N. Nuertey, K. Osei-Bonsu, F. K. Oppong, E. Marfo-Ahenkora and T. E. O. Asamoah. Journal of the Ghana Sci-ence Association 4: 73-79.

193

1842. Osei-Bonsu, K.; joint author (2002). The effect of spatial arrangement on the growth, yield and management practices of Robusta coffee (Coffea canephora) in Ghana, by F. M. Amoah, K. Osei-Bonsu, F. K. Oppong and K. Opoku-Ameyaw, Tropical Science 42: 656-662.

1843. Osei-Bonsu, K.; joint author (2002). The movement and persistence of triclopyr (Garlon 2) in some Ghanaian cocoa growing soils, by F. K. Oppong, M. R. Appiah, K. Osei-Bonsu and F. M. Amoah. In: Managing Soils for Sustainable Production of Food and Indus-trial Crops: Proceedings of the 16th Annual General Meeting of the Soil Science Society of Ghana, 1999. pp. 49-56.

1844. Osei-Bonsu, K.; joint author (2003). Intercropping Robusta coffee with some edible crops in Ghana: agronomic performance and eco-nomic returns, by K. Opoku-Ameyaw, F. K. Oppong, K. Ofori-Frimpong, F. M. Amoah and K. Osei-Bonsu. Ghana Journal of Agricultural Science 36: 13-21.

1845. Osei-Bonsu, K.; joint author (2003). Kola germplasm collection and conservation at the Cocoa Research Institute of Ghana, by A. Ab-dul-Karimu, K. Osei-Bonsu, Y. Adu-Ampomah, F. M. Amoah, G. J. Anim-Kwapong, J. F. Takrama, J. E. Sarfo and K. Acheampong. Journal of the Ghana Science Association 6(1): 139-146.

1846. Osei-Bonsu, K.; joint author (2003). The seed bank of weed species in three ecosystems in a semi-deciduous forest zone in Ghana, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. Tropical Science 43: 80-85.

1847. Osei-Bonsu, K.; joint author (2004). The coffee industry of Ghana-a breeder’s perspective, by Esther Anim-Kwapong and K. Osei-Bonsu. In: Proceedings of the 20th International Scientific Col-loquium on Coffee, Bangalore, India, 2004. Paris, ASIC. pp. 1077-1080.

1848. Osei-Bonsu, K.; joint author (2005). Agronomic and economic evalu-ation of different weed management options in young cocoa, by F. K. Oppong, E. G. Asante, K. Osei-Bonsu, K. Acheampong and F.M. Amoah. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 291-301.

1849. Osei-Bonsu, K.; joint author (2005). Biological and economic evalua-tion of some cocoa/food crop intercropping packages at establish-ment, by K. Opoku-Ameyaw, K. Osei-Bonsu, K. Ofori-Frim-pong and K. Acheampong. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 523-529.

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1850. Osei-Bonsu, K.; joint author (2005). Cocoa/Coconut intercropping trial in Ghana: Effect of the cropping systems on soil nutrient dynamics, by K. Ofori-Frimpong, A. A. Afrifa, K. Osei-Bonsu and M. R. Appiah. In: Proceedings, 14th International Cocoa Research Con-ference, Accra, Ghana, 2003. pp. 303-308.

1851. Osei-Bonsu, K.; joint author (2005). Conserving globally significant biodiversity in cocoa production landscape: Cocoa production as-sessment, by G. J. Anim-Kwapong and K. Osei-Bonsu. Final re-port submitted to Conservation International – Ghana. 39p.

1852. Osei-Bonsu, K.; joint author (2005). Farmer field school as extension strategy in the Ghana cocoa industry: Prospects and challenges, by F. Baah, K. Osei-Bonsu, A. A. Afrifa, K. Afreh-Nuamah and G. Amoako-Gyedu, In: Proceedings,14th International Cocoa Re-search Conference, Accra, Ghana, 2003. pp. 1177-1183.

1853. Osei-Bonsu, K.; joint author (2005). Managing weeds in coffee and cocoa plantations, by F. K. Oppong, K. Opoku-Ameyaw, K. Osei-Bonsu and F. M. Amoah. Journal of the Ghana Science As-sociation.

1854. Osei-Bonsu, K.; joint author (2005). Nitrogen fixing potential of Flem-ingia macrophylla when planted as temporary shade for cacao, by G. J. Anim-Kwapong and K. Osei-Bonsu. Tropical Science 45: 36-40.

1855. Osei-Bonsu, K.; joint author (2005). Preliminary studies of the control of cocoa swollen shoot disease by the use of immune crops as bar-rier, by L. A. A. Ollennu, K. Osei-Bonsu, F. Aneani and K. Acheampong. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 839 – 843.

1856. Osei-Bonsu, K.; joint author (2005). The effect of mulch on the estab-lishment and early yield of cocoa, by F. M. Amoah, K. Osei-Bonsu, F. K. Oppong, K. Opoku-Ameyaw and K. Ofori-Frim-pong, In: Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 1301-1308.

1857. Osei-Bonsu, K.; joint author (2005). The effect of seedling age at transplanting on the growth and early yield of bare-root cocoa seedlings, by F. M. Amoah, K. Opoku-Ameyaw, K. Osei-Bonsu and F. K. Oppong.Procedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp.1309-1314.

1858. Osei-Bonsu, K.; joint author (2005). The establishment and early yield of cocoa interplanted in oil palm plantation, by F. M. Amoah, B. N. Nuertey, F. K. Oppong, K. Osei-Bonsu, K. Opoku-Ameyaw,

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and T. E. O. Asamoah. Journal of the Ghana Science Association 8: 124-131.

1859. Osei-Bonsu, K.; joint author (2005). Traditional cocoa agroforestry: 2. Indigenous selection criteria for shade trees on cocoa farms in a typical cocoa growing district in Ghana, by C. Ameyaw Oduro, K. Osei-Bonsu and J. P. Tetteh. In: Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 515-522.

1860. Osei-Bonsu, K.; joint author (2005). Vegetative propagation of kola (Cola nitida (Vent.) Schott and Endl.) by stem cuttings, by F. M. Amoah, K. Osei-Bonsu, A. Y. Akrofi and A. Abdul Karimu, Ghana Journal of Agricultural Science 38: 43-53.

1861. Osei-Bonsu, K.; joint author (2006). Cocoa fermentation: the role of covering and aeration on bean quality, by Esther Anim-Kwapong, M. R. Appiah and K. Osei-Bonsu. Journal of the Ghana Science Association 8: 97-104.

1862. Osei-Bonsu, K.; joint author (2006). Effects of sulfosate on weed sup-pression, cocoa pod set, and yield of cocoa and coffee, by F. K. Oppong, J. E. Sarfo, K. Osei-Bonsu and F. M. Amoah. Ghana Journal of Agricultural Science 39(2): 115-122.

1863. Osei-Bonsu, K.; joint author (2006). Income intensification strategy: Determination of the optimum time to underplant oil palm with co-coa, by B. N. Nuertey, F. M. Amoah, A. Opoku, T. E. O. Asamoah, F. K. Oppong, K. Osei-Bonsu and E. Marfo-Ahenkora. Journal of the Ghana Science Association 8: 26-37.

1864. Osei-Bonsu, K.; joint author (2007). A review of factors affecting the quality of processed cocoa beans in Ghana, by Esther Anim-Kwapong, M. R. Appiah and K. Osei-Bonsu. Journal of the Ghana Science Association 9(1): 106-119

1865. Osei-Bonsu, K.; joint author (2007). Appraisal of some methods of weed control during initial establishment of cocoa in a semi-decid-uous forest zone of Ghana, by F. K. Oppong, K. Osei-Bonsu and F. M. Amoah. Ghana Journal of Agricultural Science 40: 67-72.

1866. Osei-Bonsu, K. (In press). The effects of different media on the suc-cess of rooting ramets of coffee clones directly in polybags. In: Pro-ceedings of the 19th Internetional Scientific Colloquium on Coffee, Trieste, Italy, 14-18 May 2001. [4p.] (On compact disc).

1867. Osei-Bonsu, K.; joint author (In Press). Residual effects of oxyfluorfen on cocoa seedlings and its mobility in cocoa-growing soil, by F. K. Oppong, K. Osei-Bonsu and K. Ofori-Frimpong. Journal of the Ghana Science Association

196

1868. Osei-Wusu. A.; joint author (2007). Comparison of cocoa Research In-stitute of Ghana recommendations and traditional farmer methods on cocoa establishment, by F. K. Oppong, E. G. Asante, K. Opoku-Ameyaw, E. A. Dwomoh, K. Ofori-Frimpong and A. Osei-Wusu. In: Proceedings, 15th International Cocoa Research Conference, San Jose, Costa Rica, 2006. pp. 273-280.

1869. Overfield, D.; Riches, C.; Asamoah, M.; Sarkodie, O.; Baah, F. (1998). A farming systems analysis of the mistletoe problem in Ghanaian cocoa. Cocoa Growers’ Bulletin 51: 42-50.

1870. Owen, H. (1951). Cacao pod diseases in West Africa. Annals of Applied Biology 38: 715-718.

1871. Owen, H. (1956). Further observations on the pathogenicity of Calonectria rigidiuscula (Berk & Br) Sacc. to Theobroma cacao L. Annals of Applied Biology 44: 307-321.

1872. Owen, H.; joint author (1950).. Biological control of the mealybug vec-tors of swollen shoot virus of cacao. J. Nicol, H. Owen and A. H. Strickland. Nature165: 490.

1873. Owusu, E. B.; joint author (2000). Report on a survey on insecticide use and residues in cocoa beans in Ghana. A technical report on investigations requested by the Ghana Cocoa Board, by B. Padi, M. A. Abitey, E. B. Owusu, A. A. Fofie, E. Asante, J. B. Ackonor

1874. Owusu, G. K. (1971). A suspected virus from soybean infecting cocoa seedlings. Ghana Journal of Agricultural Science 4: 201-204.

1875. Owusu, G. K. (1971). Availability of cocoa swollen shoot virus to mealybugs from tolerant and sensitive cocoa. In: Proceedings, 3rd International Cocoa Research Conference, Accra, Ghana, 1969. pp.512-517.

1876. Owusu, G. K. (1971). Cocoa necrosis virus in Ghana. Tropical Agricul-ture 48: 133-139.

1877. Owusu, G. K. (1978). Performance of the Eastern Region Cocoa Project. Disease control: swollen shoot disease. Report on the Eval-uation of the Ghana Government/World Bank Cocoa Rehabilitation Projects in the Eastern and Ashanti Regions. Accra, Ghana Govern-ment/World Bank Cocoa Projects Evaluation Committee. pp. 87-88.

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1878. Owusu, G. K. (1981). The problem of cocoa swollen shoot disease in the Eastern Region of Ghana. Paper presented at the 1st Interna-tional Plant Virus Epidemiology. Workshop, 28-31 July, 1981, Ox-ford, England, U.K.

1879. Owusu, G. K. (1983). The cocoa swollen shoot disease problem in Ghana. In: Plant Virus Epidemiology; edited by R. T. Plumb and J. M. Thresh. Oxford, Blackwell Scientific Publications. pp.73-83.

1880. Owusu, G. K. (1988). Non-transmission of cocoa swollen shoot virus by Phenacoccus manihoti Mat-Ferr. in Ghana. In: Proceedings, 10th International Cocoa Research Conference, Santo Domingo, Domini-can Republic, 1987. pp. 527-529.

1881. Owusu, G. K. (1988). Virus diseases of cocoa in Ghana. In: Virus Dis-eases of Plants in Africa, edited by A.O. Williams, A. L. Mbiele and N. Nkouka. Lagos, Nigeria, OAU/STRC Scientific Publications. pp. 9-27.

1882. Owusu, G. K. (2000). Sustaining cocoa productions in Ghana. Paper presented at the 10th Meeting of the Advisory Group on the World Cocoa Economy, Santo Domingo, Dominican Republic.

1883. Owusu, G. K.; Adomako, B.; (2004). The status of cocoa quarantine in Ghana. In: Proceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, Accra, Ghana, 2003. pp. 1-7.

1884. Owusu, G. K.; Bonney, J. K. (1979). Report on visit to the Institut Français du Café et du Cacao (I.F.C.C.), Kpalime, Togo, on 14 th to 22nd May, 1979 to study and assess the cocoa swollen shoot dis-ease situation in the Republic of Togo. 7p. Mimeographed.

1885. Owusu, G. K.; Ollennu, L. A. A. (1997). The problem of the reinfec-tion of replanted cocoa by cocoa swollen shoot virus in Ghana. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp.179-189.

1886. Owusu, G. K.; Ollennu, L. A. A. (1999). Some recent studies on the control of cocoa swollen shoot disease. In: Proceedings of the 17th

Biennial Conference of the Ghana Science Association (Special Edi-tion). pp. 212-216.

1887. Owusu, G. K.; Ollennu, L. A. A.; Dzahini-Obiatey, H. (1999). The prospects for mild strain cross-protection to control cocoa swollen shoot disease in Ghana. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.121-127.

1888. Owusu, G. K.; Padi, B. (2005). Increased productitvity and quality through the production and distribution of improved planting ma-

198

terial and promotion of integrated pest management (IPM) strat-egy. Proceedings, 14th International Cocoa Research Conference, Accra, Ghana, 2003. pp. 541-558.

1889. Owusu, G. K.; Thresh, J. M. (1983). Cocoa swollen shoot disease in Ghana: an assessment of the current situation. Paper presented at the 4th International Congress of Plant Pathology, Melbourne, Aus-tralia. Abstracts of papers. p.93.

1890. Owusu, G. K.; Thresh, J. M. (1983). The cocoa swollen shoot virus eradication campaign in Ghana. Paper presented at the 10th Inter-national Congress of Plant Protection, Brighton, U.K. Abstracts of papers, Vol. 2. p. 881.

1891. Owusu, G. K.; joint author (1974). Purification of cocoa necrosis virus from cocoa leaves, by D. Adomako, G. K. Owusu and K. K. Oduro. Phytopathology 64: 1325-1330.

1892. Owusu, G. K.; joint author (1974). Studies on the mechanical trans-mission of cocoa swollen shoot virus: some factors affecting virus multiplication and symptom development in cocoa, by D. Ado-mako and G. K. Owusu. Ghana Journal of Agricultural Science 7: 7-15.

1893. Owusu, G. K.; joint author (1976). Ghana’s cocoa industry and the virus swollen shoot disease, by J. T. Legg and G. K. Owusu, G. K. 1st International Conference on the Impact of Viral Diseases on the Development of African countries, Abidjan, Côte d’Ivoire. Abs-tract in Maladies Virales et le Developpment de l’Afrique, edited by E. Kurstak. Universite de Montréal. 68p.

1894. Owusu, G. K.; joint author (1978). The problems of controlling cocoa swollen shoot disease in Ghana, by J. T. Legg, G. K. Owusu, L. A. A. Ollennu and N. K. Lovi. In: Proceedings, 6th International Cocoa Research Conference, Caracas, Venezuela, 1977. pp. 267-278.

1895. Owusu, G. K.; joint author (1981). Meloidogyne incognita infection of cocoa seedlings, by A. Asare-Nyako and G. K. Owusu. In: Pro-ceedings, 7th International Cocoa Research Conference, Douala, Cameroun, 1979. pp. 457-461.

1896. Owusu, G. K.; joint author (1983). Improved methods for the purifica-tion and detection of cocoa swollen shoot virus, by D. Adomako, D.-E. Lesemann, H. L. Paul and G. K. Owusu. Annals of Applied Bi-ology 103: 109-116.

1897. Owusu, G. K.; joint author (1983). The use of enzyme-linked im-munosorbent assay (ELISA) for detection of cacao swollen shoot virus (CSSV) in Theobroma cacao, by W. Sagemann, H. L. Paul, D.

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Adomako and G. K. Owusu. Phytopathologische Zeitschrift 106: 281-284.

1898. Owusu, G. K.; joint author (1984). Coppicing experiments on the spread and control of swollen shoot virus in Ghana, by J. T. Legg, N. K. Lovi, L. A. A. Ollennu, G. K. Owusu and J. M. Thresh. Crop Protection 3: 289-304

1899. Owusu, G. K.; joint author (1985). Detection and comparison of some Ghanaian isolates of cacao swollen shoot virus (CSSV) by enzyme-Iinked immunosorbent assay (ELISA) and immunoelectron mi-croscopy (IEM) using an antiserum to CSSV strain 1A, by W. Sage-mann, D.-E. Lessemann, H. L. Paul, D. Adomako and G. K. Owusu. Phytopathologische Zeitschrift 114: 79-89.

1900. Owusu, G. K.; joint author (1985). Somatic embryogenesis and in vitro plant development of cocoa, by F. J. Novak, B. Donini and G. K. Owusu. IAEA/FAO International Symposium on Nuclear techniques and in vitro culture for plant improvement, 19-23 Aug. 1985, Vi-enna, Austria. pp. 443-449.

1901. Owusu, G. K.; joint author (1986). The control of cocoa swollen shoot disease in Ghana: an evaluation of eradication procedures, by J. M. Thresh and G. K. Owusu. Crop Protection 5: 41-52.

1902. Owusu, G. K.; joint author (1988). Cocoa swollen shoot: an archetypal crowd disease, by J. M. Thresh, G. K. Owusu and L. A. A. Ol-lennu. Zeitschrift fur Pflanzenkrankeiten und Pflanzenschutz 94: 428-446.

1903. Owusu, G. K.; joint author (1988). Ghanaian cocoa varieties and swollen shoot virus, by J. M. Thresh, G. K. Owusu, A. Boamah and G. Lockwood. Crop Protection 7: 219-231.

1904. Owusu, G. K.; joint author (1988). Studies of the re-infection of re-planted cocoa by cocoa swol1en shoot virus in Ghana, by L. A. A. Ollennu and G. K. Owusu. In: Proceedings, 10th International Co-coa Research Conference, Santo Domingo, Dominican Republic, 1987. pp. 515-520.

1905. Owusu, G. K.; joint author (1989). Isolation and study of mild strains of cocoa swollen shoot virus for possible cross protection, by L. A. A. Ollennu and G. K. Owusu. In: Proceedings of the 4th Interna-tional Plant Virus Epidemiology. Workshop, 1989, Montpellier, France. pp. 119-122.

1906. Owusu, G. K.; joint author (1989) The control of swollen shoot disease in Ghana, by L. A. A. Ollennu, G. K. Owusu and J. M. Thresh. Cocoa Growers’ Bulletin 42: 25-35.

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1907. Owusu, G. K.; joint author (1989). The spread of cocoa swollen shoot virus to recent plantings in Ghana, by L. A. A. Ollennu, G. K. Owusu and J. M. Thresh. Crop Protection 8: 251-264.

1908. Owusu, G. K.; joint author (1994). Induction of cocoa swollen shoot disease-resistant mutants by gamma irradiation, by Y. Adu-Am-pomah and G. K. Owusu. In: Proceedings, 11th International Co-coa Research Conference, Yamoussoukro, Republique de Côte d’Ivoire, 1993. pp. 585-589.

1909. Owusu, G. K.; joint author (1994). The importance to cocoa research of understanding farmers’ rationale towards pest and disease con-trol: with reference to capsid and blackpod disease control in Ghana, by C. P. Henderson, G. K. Owusu, A. F. Jones and B. Padi. In: Proceedings, 11th International Cocoa Research Confer-ence, Yamoussoukro, Republique de Côte d’ Ivoire, 1993. pp. 299-304.

1910. Owusu, G. K.; joint author (1994). The separation and detection of mild strains of cocoa swollen shoot virus, by L. A. A. Ollennu, J. d’A. Hughes, G. K. Owusu and J. D. Amponsah. In: Proceed-ings, 11th International Cocoa Research Conference, Yamous-soukro, Republique de Côte d’Ivoire, 1993. pp. 261-267.

1911. Owusu, G. K.; joint author (1995). A severe type of blackpod disease in Ghana, by I. Y. Opoku and G. K. Owusu. CRIG Newsletter 11:1-4.

1912. Owusu, G. K.; joint author (1995). Polymerase chain reaction and im-munocapture polymerase chain reaction (ICPCR) for the detection and identification of cocoa swollen shoot virus isolates, by S. T. Sackey, S. T. Lowor, H. Dzahini-Obiatey, G. K. Owusu, D. Adomako, K. Hoffmann, H. J. Vetten, and E. Maiss. Ghana Journal of Biochemistry, Biotechnology and Molecular Biology 3: 57-66.

1913. Owusu, G. K.; joint, author (1996). Breeding for resistance to the co-coa swollen shoot virus in Ghana, by Y. Adu-Ampomah, B. Ado-mako, G. K. Owusu and L. A. A. Ollennu. In: Proceedings of the International Workshop on the Contribution of Disease Resistance to Cocoa Variety Improvement, Salvador, Bahia, Brazil, 1996. pp.173-179.

1914. Owusu, G. K.; joint author (1996). Mild strain cross-protection of co-coa against cocoa swollen shoot badnavirus, by L. A. A. Ollennu, J. d’A. Hughes and G. K. Owusu. Tropical Science 36: 116-128

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1915. Owusu, G. K.; joint author (1996). Use of gamma rays to induce mu-tants resistant to cocoa swollen shoot disease in Theobroma cacao L., by Y. Adu-Ampomah, G. K. Owusu, S. T. Sackey, B. Padi and A. Abdul-Karimu. Plant Breeding 115: 74-76.

1916. Owusu, G. K.; joint author (1997). Cocoa mistletoes: a review, by A. A. Appiah and G. K. Owusu. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995. Accra, Ghana. pp. 272-279.

1917. Owusu, G. K.; joint author (1997). Mild virus strain protection studies with cocoa swollen shoot badnavirus in Ghana, by L. A. A. Ol-lennu and G. K. Owusu. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 204-211.

1918. Owusu, G. K.; joint author (1997). Polymerase chain reaction and nu-cleic acid hybridization methods for the detection and differentia-tion of cocoa swollen shoot virus isolates, by S. T. Sackey, S. T. Lowor, H. Dzahini-Obiatey, G. K. Owusu, D. Adomako, K. Hoffmann, H. J. Vetten and E. Maiss. In: Proceedings, 1st Interna-tional Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp.191-200

1919. Owusu, G. K.; joint author (1998). Towards an integrated pest man-agement for sustainable cocoa production in Ghana, by B. Padi and G. K. Owusu. In: Proceedings of the 1st International Work-shop on Sustainable Cocoa Production, Panama City, Panama, 1998. p.28. (On the Internet)

1920. Owusu, G. K.; joint author (1999). A record of Desplatsia dewevrei (de Wild & Th. Dur.) (Tiliales: Tiliacae) as an alternative and potential breeding host plant for the cocoa mirid Sahlbergella singularis Hagl., by B. Padi, G. K. Owusu and N. K. Kumah. In: Proceed-ings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 31-37.

1921. Owusu, G. K.; joint author (1999). Breeding for resistance to cocoa swollen shoot virus in Ghana, by Y. Adu-Ampomah, B. Ado-mako, G. K. Owusu and L. A. A. Ollennu. In: Proceedings of the International Workshop on the Contribution of Disease Resistance to Cocoa Variety Improvement, Salvador, Bahia, Brazil, 1996. pp.173-179.

1922. Owusu, G. K.; joint author (1999). Recent studies of mild strain cross-protection with cocoa swollen shoot virus, by L. A. A. Ollennu, G.

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K. Owusu and H. Dzahini-Obiatey. Journal of the Ghana Science Association (Special Edition) 2(3): 5-11.

1923. Owusu, G. K.; joint author (1999). The use of cocoa seedlings for field evaluation of mild strain protection against cocoa swollen shoot badnavirus, by L. A. A. Ollennu and G. K. Owusu. Journal of the Ghana Science Association 4(1): 14-18.

1924. Owusu, G. K.; joint author (1999). Variation in cocoa swollen shoot virus isolates, by S. T. Sackey, H. Dzahini-Obiatey, G. K. Owusu and D. Adomako. In: Proceedings, 12th International Co-coa Research Conference, Salvador, Bahia, Brazil, 1996. pp. 193-199.

1925. Owusu, G. K.; joint author (2000). Phytophthora megakarya: A poten-tial threat to the cocoa industry in Ghana, by I. Y. Opoku, A. A. Appiah, A. Y. Akrofi and G. K. Owusu. Ghana Journal of Agricul-tural Science 33: 237-248.

1926. Owusu, G. K.; joint author (2000). The state of sheanut research in Ghana, by K. Opoku-Ameyaw and G. K. Owusu. In: Proceedings of the 1st Regional Conference on the Sheabutter Tree (Vitellaria paradoxa subspecies nilotica) for Eastern and Central Africa, 2000, Lira, Uganda. 43-57.

1927. Owusu, G. K.; joint author (2001). An alternative source for the ex-traction and purification of cocoa swollen shoot badnavirus (CSSV), by H. K. Dzahini-Obiatey, P. C. Aculey and G.K. Owusu. Journal of the Ghana Science Association 3(2): 102-109.

1928. Owusu, G. K.; joint author (2001). Cocoa swollen shoot virus re-infec-tion of replanted cocoa: a case study, by L. A. A. Ollennu and G. K. Owusu. In: Proceedings, 13th International Cocoa Research Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 769-776.

1929. Owusu, G. K.; joint author (2001). Effects of cocoa swollen-shoot virus on the yield of mature bearing trees of Upper Amazon cocoa hy-brids in Ghana, by B. Adomako, Y. Adu-Ampomah, G. K. Owusu and L. A. A. Ollennu. Journal of the Ghana Science Asso-ciation 3: 1-6.

1930. Owusu, G. K.; joint author (2002). Spread of cocoa swollen shoot virus to cacao (Theobroma cacao) plantings in Ghana, by L. A. A. Ol-lennu and G. K. Owusu. Tropical Agriculture 79: 224-230.

1931. Owusu, G. K.; joint author (2003). Detection of cocoa swollen shoot badnavirus (CSSV) by enzyme-linked immunosorbent assay

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(ELISA): Recent developments, by H. K. Dzahini-Obiatey, P. C. Aculey, L. A. A. Ollennu and G. K. Owusu. Journal of the Ghana Science Association 5(1): 1-7.

1932. Owusu, G. K.; joint author (2003). Field evaluation of the protective capability of CSSV mild strain N1 against severe strain New Juaben (1A) isolate, by L. A. A. Ollennu and G. K. Owusu. Ghana Journal of Agricultural Science 36: 3-12.

1933. Owusu, J. K. (1974). The adaptability of cocoa (Theobroma cacao L.) seedlings to light intensity. M. Sc. Thesis, University of Ghana, Legon, Ghana. 125p.

1934. Owusu, J. K.; Adomako, D.; Hutcheon, W. V. (1978). Seasonal changes in total free sugar content of field cocoa plants. Physiolo-gia Plantarum 44: 43-47.

1935. Owusu, J. K.; joint author (1975). Growth analysis and photosynthetic rates of cocoa (Theobroma cacao L.) seedlings in relation to vary-ing shade and nutrient regimes, by D. U. Okali and J. K. Owusu. Ghana Journal of Agricultural Science 8: 51-67.

1936. Owusu-Ansah, F. (2004). Analysis and interpretation of Genotype by Environment interaction using Additive Main Effect and Multiplica-tion Interaction (AMM) Model. M.Sc. Thesis, Kwame Nkrumah Uni-versity of Science and Technology, Kumasi, Ghana.

1937. Owusu-Ansah, F.; joint author (2007). Heritability of single plant yield and incidence of blackpod disease in cocoa, by G. Lockwood, F. Owusu-Ansah and Y. Adu-Ampomah. Experimental Agriculture 43: 455-462.

1938. Owusu-Ansah, F.; joint author (2007). Investigations into the critical period of weed competition in young Theobroma cacao L., by F. K. Oppong, K. Opoku-Ameyaw, K. Ofori-Frimpong and F. Owusu-Ansah. In: Proceedings, 15th International Cocoa Re-search Conference, San Jose, Costa Rica, 2006. pp. 281-290.

1939. Owusu-Ansah, F.; joint author (2008). Supplementation of grazing cattle: the use of a diet containing graded levels of dried cashew pulp, by E. O. K. Oddoye, J. F. Takrama, F. Owusu-Ansah, V. Johnson. Bulletin of Animal Health and Production in Africa 56: 136-142.

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1940. Owusu-Ansah, F.; joint author (In press). Determining the critical pe-riod of weed competition in young clonal Robusta coffee in Ghana, by F. K. Oppong, K. Opoku-Ameyaw and Owusu-Ansah, F. In: Proceedings of the 22nd International Scientific Colloquium on Cof-fee , Campinas, SP-Brazil, 14-19 September 2008.

1941. Owusu-Manu, E. (1971). Bathycoelia thalassina – another serious pest of cocoa in Ghana. CMB Newsletter 47: 12-14.

1942. Owusu-Manu, E. (1972). Biology and control of Bathycoelia thalassina (H.S.) (Pentatomidae, Hemiptera), a pest of cocoa in Ghana. In: Proceedings, 4th International Cocoa Research Conference, St. Au-gustine, Trinidad and Tobago, 1972. pp.539-547.

1943. Owusu-Manu, E. (1974). Biology and ecology of Bathycoelia tha-lassina (H-S.) (Heteroptera: Pentatomidae), a pest of cocoa in Ghana. Ph. D Thesis, University of Ghana, Legon, Ghana. 248p.

1944. Owusu-Manu, E. (1974). The effects of insecticides used in the con-trol of cocoa mirids on non-target organisms. In: Proceedings of the 4th Conference of West African Cocoa Entomologists, Legon, Ghana, 1974. pp. 114-118.

1945. Owusu-Manu, E. (1975). Biology of Bathycoelia thalassina (H.-S.) (Heteroptera: Pentatomidae) in Ghana. In: Proceedings of the 4th

West African Cocoa Entomologists Conference, 1974, Legon, Accra, Ghana. pp.3-10.

1946. Owusu-Manu, E. (1976). Comparative effectiveness of three insectici-dal equipments to control capsids, Distantiella theobroma (Dist.) (Hemiptera: Miridae) in Ghana. In: Proceedings of the 5th West African Cocoa Entomologists Conference, 1975, Yaoundé, Camer-oun.

1947. Owusu-Manu, E. (1976). Estimation of cocoa pod losses caused by Bathycoelia thalassina (Herrich-Schaeffer) (Hemiptera, Pentatomi-dae). Ghana Journal of Agricultural Science 9: 81-83.

1948. Owusu-Manu, E. (1976). Natural enemies of Bathycoelia thalassina (Herrich-Schaeffer) (Hemiptera, Pentatomidae), a pest of cocoa in Ghana. Biological Journal of the Linnaean Society 8: 217-244.

1949. Owusu-Manu, E. (1976). Notes on some factors influencing egg pro-duction and development in Bathycoelia thalassina (Herrich-Scha-effer) (Hemiptera, Pentatomidae) Journal of Natural History 11: 425-444.

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1950. Owusu-Manu, E. (1977). Cyclodiene resistance in cocoa mirids in Ghana: the present situation, 1970-74. In: Proceedings, 5th Inter-national Cocoa Research Conference, Ibadan, Nigeria, 1975. pp.482-484.

1951. Owusu-Manu, E. (1977). Distribution and abundance of the cocoa shield bug, Bathycoelia thalassina (Hemiptera, Pentatomidae) in Ghana. Journal of Applied Ecology14: 331-341.

1952. Owusu-Manu, E. (1977). Flight activity and dispersal of Bathycoelia thalassina (Herrich-Schaeffer), (Hemiptera, Pentatomidae) Ghana Journal of Agricultural Science 10: 23-26.

1953. Owusu-Manu, E. (1977). Insecticide residues and tainting in cocoa. Pesticide management and insecticide resistance. pp. 555-564.

1954. Owusu-Manu, E. (1977). Possibilities of integrated control of Bathy-coelia thalassina (H.-S.) (Hemiptera, Pentatomidae). In: Proceed-ings, 5th International Cocoa Research Conference, Ibadan, Nige-ria, 1975. pp.485-490.

1955. Owusu-Manu, E. (1977). Relationship of Bathycoelia thalassina (H.-S.) (Hemiptera, Pentatomidae) and other insects associated with co-coa in Ghana. In: Proceedings of the 5th West African Cocoa Ento-mologists Conference, 1976, Yaoundé, Cameroon. pp. 99-103.

1956. Owusu-Manu, E. (1978). Host plants of Bathycoelia thalassina (H.-S.) (Hemiptera, Pentatomidae) in Ghana. Entomologist’s Monthly Mag-azine 114: 201-202.

1957. Owusu-Manu, E. (1980). Observation, mating and egg-laying behav-iour of Bathycoelia thalassina (Herrich-Schaeffer) (Hemiptera; Pen-tatomidae). Journal of Natural History 14: 463-467.

1958. Owusu-Manu, E. (1981). Effect of physical environment on the abun-dance of Bathycoelia thalassina (Herrich-Schaeffer) (Hemiptera, Pentatomidae), in Ghana. In: Proceedings, 7th International Cocoa Research Conference, Douala, Cameroon, 1979. pp. 463-468.

1959. Owusu-Manu, E. (1985). The evaluation of the synthetic pyrethroids for the control of Distantiella theobroma Dist. (Hemiptera, Miridae) in Ghana. In: Proceedings, 9th International Cocoa Research Con-ference, Lome, Togo, 1984. pp. 535-538.

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1960. Owusu-Manu, E. (1990). Feeding behaviour and the damage caused by Bathycoelia thalassina (Herrich-Schaeffer) (Hemiptera, Pentato-midae) Café, Cacao, Thé 34: 97-104.

1961. Owusu-Manu, E. (1990). CRIG experience in off-station research (en-tomology) In: Proceedings of the 1st Farming Systems Workshop, 1990, CRIG, Tafo, Ghana. pp. 65-68.

1962. Owusu-Manu, E. (1997). Application techniques and equipment for effective control of cocoa mirids in Ghana. In: Proceedings, 1st In-ternational Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp.57-62.

1963. Owusu-Manu, E. (1997). Biology and importance of Cylindromyia cribrata (Villen) (Diptera: Tachinidae), a parasitoid of Bathycoelia thalassina (H-S) (Hemiptera, Pentatomidae) In: Proceedings, 1st In-ternational Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 23-27.

1964. Owusu-Manu, E. (1997). Integrated strategies for managing capsid damage on cocoa. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp.37-42.

1965. Owusu-Manu, E. (1999). Insecticide residues and tainting in cocoa beans. In: Proceedings, 12th International Cocoa Research Confer-ence, Salvador, Bahia, Brazil, 1996. pp.793-800.

1966. Owusu-Manu, E. (1999). The effect of insecticide sprays on the soil fauna of cocoa farms in Ghana. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.13-17.

1967. Owusu-Manu, E. (2001). Frequency and timing of insecticide applica-tion to control cocoa mirids. Ghana Journal of Agricultural Science 34: 71-76.

1968. Owusu-Manu, E. (2002). New approach to mirid control on mature co-coa. Ghana Journal of Agricultural Science 35: 111-120.

1969. Owusu-Manu, E.; Kumar, R. (1975), Evaluation of chemicals for the control of insect pests in Ghana. In: Proceedings of the 4th West African Entomologists Conference, 1974, Legon, Ghana. pp. 132-138.

1970. Owusu-Manu, E.; Somuah, J. M.; Padi, B. (1978). Studies on sea-sonal movement of the cocoa mirids, Distantiella theobroma (Dist.) and Sahlbergella singularis (Hagl.) (Hemiptera: Miridae) in an in-

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fested area. In: Proceedings, 6th International Cocoa Research Conference, Caracas, Venezuela, 1977. pp. 402-407.

1971. Owusu-Manu, E.; joint author (1979). Propoxur residues in cocoa beans, by D. Adomako and E. Owusu-Manu. In: Radiotracer Studies of Pesticide Residues in Edible Oil Seeds and Related Products, IAEA, Vienna, Austria. pp. 51-57.

1972. Owusu-Manu, E.; joint author (2000). Recent advances in the devel-opment of an integrated pest management strategy for the control of cocoa mirids and mealybug vectors of the cocoa swollen shoot virus disease in Ghana, by B. Padi, J. B. Ackonor, I. Y. Opoku, D. Hall, D. Farman, M. Downham, G. Oduor, S. Lowor, E. Owusu-Manu, Y. Adu-Ampomah, J. E. Sarfo, R. Adu-Acheampong, I. Reich and E. Adusei. In: Proceedings of INCOPED 3rd International Cocoa Pests and Diseases Seminar, 2000, Kota Kinabalu, Sabah, Malaysia. pp. 114-122.

1973. Padi, B. (1976). The long term effects of insecticides on the cocoa ecosystem – Preliminary results on pollination and yield. In: Pro-ceedings of the 5th West African Cocoa Entomologists Conference, 1975, Yaoundé, Cameroun. pp.17-23.

1974. Padi, B. (1986). Proposed integrated control approach to insect pests of coffee in Ghana. In: Proceedings of the 11th International Scien-tific Colloquium on Coffee, 1985, Lome, Togo. Paris, ASIC. pp. 647-653.

1975. Padi, B. (1985). The long-term effects of Ortho-bux and Lindane/Propoxur on the cocoa ecosystem. (1) Effects on minor pests and other non-target organisms. In: Proceedings, 9th International Co-coa Research Conference, Lome, Togo, 1984. pp. 609-615.

1976. Padi, B. (1990). Application of morphometric analysis and gel elec-trophoresis to the identification of mealybug vectors (Homoptera: Pseudococcidae) of cocoa swollen shoot virus (CSSV) in Ghana. Ph. D. Thesis, University of Wales, College of Cardiff, U. K. 509p.

1977. Padi, B. (1993). Laboratory and small-scale field tests of four insecti-cides against defoliating caterpillars of Epicampoptera strandi glauca Hamps. (Lepidoptera: Drepanidae) on coffee in Ghana. In: Proceedings of the 15th International Scientific Colloquium on Cof-fee, 1993, Montpellier, France. Paris, ASIC. pp. 853-859.

1978. Padi, B. (1994). Identification of the mealybug vectors of cocoa swollen shoot virus (CSSV) disease in Ghana by isoenzyme gel electrophoresis. In: Proceedings, 11th International Cocoa Re-

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search Conference, Yamoussoukro, Republique de Côte d’Ivoire, 1993. pp. 971-983.

1979. Padi, B. (1997). Laboratory evaluation of the relative preferences by Epicampoptera ivoirensis Watson (Lepidoptera: Drepanidae) on five coffee types. In: Proceedings of the 17th International Scientific Colloquium on Coffee, 1997, Nairobi, Kenya. Paris, ASIC. pp.760-765.

1980. Padi, B. (1997). Morphological variations in cocoa mealybugs. In: Pro-ceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 218-237.

1981. Padi, B. (1997). Parthenogenesis in mealybugs occurring on cocoa. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 242-248.

1982. Padi, B. (1997). Prospects for the control of cocoa capsids-alterna-tives to chemical control. In: Proceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 28-36.

1983. Padi, B. (1997). Prospects for the control of cocoa mealybugs. In: Pro-ceedings, 1st International Cocoa Pests and Diseases Seminar, 1995, Accra, Ghana. pp. 249-263.

1984. Padi, B. (1999). Insects associated with coffee berries. In: Proceedings of the 18th International Scientific Colloquium on Coffee, 1999, Hel-sinki, Finland. Paris, ASIC. pp. 524-528.

1985. Padi, B.; Abitey, M. A.; Owusu, E. B.; Fofie, A. A.; Asante, E.; Ack-onor, J. B. (2000). Report on a survey on insecticide use and residues in cocoa beans in Ghana. A technical report on investiga-tions requested by the Ghana Cocoa Board.

1986. Padi, B.; Ackonor, J. B.; Opoku, I. Y.; Hall, D.; Farman, D.; Down-ham, M.; Oduor, G.; Lowor, S.; Owusu-Manu, E.; Adu-Am-pomah, Y.; Sarfo, J. E.; Adu-Acheampong, R.; Reich, I.; Adu-sei, E. O. (2001). Recent advances in the development of inte-grated pest management strategy for the control of cocoa mirids and mealybug vectors of the cocoa swollen shoot virus disease in Ghana. In: Proceedings of INCOPED 3rd International Cocoa Pests and Diseases Seminar, 2000, Kota Kinabalu, Sabah, Malaysia. pp. 114-122.

1987. Padi, B.; Adu-Acheampong, R. (2001). An integrated pest manage-ment strategy for the control of the coffee stem borer, Bixadus sierricola White (Coleoptera: Lamiidae). In: Proceedings of the 19th

International Scientific Colloquium on Coffee, Trieste, Italy, 14-18th

May 2001. [5p.] (On compact disc).

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1988. Padi, B.; Adu-Acheampong, R. (2001). Preliminary measures for the control of the cocoa stem borer Eulophonotus myrmeleon Fldr. (Lepidoptera: Cossidae). Proceedings, 13th International Cocoa Re-search Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 649-654.

1989. Padi, B.; Adu-Acheampong, R.; Asamoah, M. (2005). On-farm tri-als on thaimethoxam (Actara 240 SC) and fenobucard (Bassa 500 EC) for the control of cocoa capsids (Heteroptera: Miridae) in Ghana. Proceedings, 14th International Cocoa Research Confer-ence, Accra, Ghana, 2003. pp. 827-834.

1990. Padi, B.; Adu-Acheampong, R.; Asamoah, M.; Aneani, F.; Baah, F.; Tamakloe, M. K. (2004). Screening of neem extracts for the control of cocoa capsids (Heteroptera: Miridae) In: Proceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, 2003, Accra, Ghana. pp. 44-52.

1991. Padi, B.; Adu-Acheampong, R.; Nkansah, A. (2001). Botanical pes-ticides for the control of cocoa capsids (Heteroptera: Miridae). Pro-ceedings, 13th International Cocoa Research onference, Kota Kina-balu, Sabah, Malaysia, 2000. pp. 403-4111.

1992. Padi, B.; Ampomah, E. (1996). Insect succession on three coffee types in Ghana. Ghana Journal of Agricultural Science 28/29: 61-67.

1993. Padi, B.; Downham, M.; Dudley, F. Sarfo, J. E. (2001) Evidence of sex attractants in the cocoa mirids Distantiella theobroma (Dist.) and Sahlbergella singularis Hagl. (Heteroptera: Miridae) in field trap-ping experiments. In: Proceedings, 13th International Cocoa Re-search Conference, Kota Kinabalu, Sabah, Malaysia, 2000. pp. 395-400.

1994. Padi, B.; Hall, D.R.; Sarfo, J. E.; Downham, M.C.A.; Farman, D.I. (2004). Development of sex pheromone traps for the monitoring and control of cocoa capsids in Ghana: Update on field trials. In: Proceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, Accra, Ghana, 2003. pp. 79-83.

1995. Padi, B.; Hollander, J. den. (1996). Morphological variation in Planococ-coides njalensis occurring on cocoa in Ghana. Entomologia Experi-mentalis et Applicata 79: 317-328.

1996. Padi, B.; Lowor, S.; Sarfo, J.E.; Hall, D.; Cork, A.; Downham, M.; Far-man, D.; Innocenzi, P.; Phythian, S. (2002). Sex pheromone compo-nents of the cocoa mirids, Distantiella theobroma (Dist.) and Sahlbergella singularis Hagl. (Heteroptera: Miridae). Paper pre-

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sented at the 19th meeting of International Society of Chemical Ecology, University of Hamburg, Germany, 3-7 August, 2002.

1997. Padi, B.; Owusu, G. K. (1998). Towards integrated pest management for sustainable cocoa production in Ghana. In: Proceedings of the 1st International Workshop on Sustainable Cocoa Production, 1998, Panama City, Panama. 28p.

1998. Padi, B.; Owusu, G. K.; Kumah, N. K. (1999). A record of Desplatsia dewevrei (de Wild & Th. Dur.) (Tiliales: Tiliacae) as an alternative and potential breeding host plant for the cocoa mirid Sahlbergella singularis Hagl. In: Proceedings, 12th International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.31-37.

1999. Padi, B.; Sackey, S. T. (1999). Differentiation of the mealybug species Planococcoides njalensis and Planococcus citri by poly-merase chain reaction. In: Proceedings, 12th. International Cocoa Research Conference, Salvador, Bahia, Brazil, 1996. pp.187-191.

2000. Padi, B.; joint author (1978). Studies on seasonal movement of the co-coa mirids, Distantiella theobroma (Dist.) and Sahlbergella singu-laris (Hagl.) (Hemiptera: Miridae) in an infested area, by E. Owusu-Manu, J. M. Somuah and B. Padi. In: Proceedings, 6th International Cocoa Research Conference, Caracas, Venezuela, 1977. pp. 402-407.

2001. Padi, B.; joint author (1994). The importance to cocoa research of un-derstanding farmers’ rationale towards pest and disease control: with reference to capsid and blackpod disease control in Ghana, by C. P. Henderson, G. K. Owusu, A. F. Jones and B. Padi. In: Proceedings, 11th International Cocoa Research Conference, Ya-moussoukro, Republique de Côte d’ Ivoire, 1993. pp. 299-304.

2002. Padi, B. joint author (1996). Use of gamma rays to induce mutants re-sistant to cocoa swollen shoot disease in Theobroma cacao L., by Y. Adu-Ampomah, G. K. Owusu, S. T. Sackey, B. Padi and A. Abdul-Karimu. Plant Breeding, 115: 74-76.

2003. Padi, B.; joint author (2002). Breeding and genetics of cocoa swollen shoot virus disease resistance in Theobroma cacao L., by Y. Adu-Ampomah, L.A.A. Ollennu, B. Adomako and B. Padi, Journal of the Ghana Science Association 4: 8-21.

2004. Padi, B.; joint author (2004). Sexual attraction in the cocoa stem borer, Eulophonotus myrmeleon Fldr. (Lepidoptera: Cossidae), by R. Adu-Acheampong, B. Padi and J. E. Sarfo. In: Proceedings of INCOPED 4th International Cocoa Pests and Diseases Seminar, 2003, Accra, Ghana. pp. 136-138.

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2005. Padi, B.; joint author (2004). The life cycle of the cocoa stem borer in Ghana, by R. Adu-Acheampong, B. Padi and J. E. Sarfo. Tropi-cal Science 44: 28-30.

2006. Padi, B.; joint author (2005). Effects of two herbicides and four fungi-cides on insect pollination of cocoa, by J. E. Sarfo, B. Padi, F. K. Oppong, I. Y. Opoku and A. Y. Akrofi. In: Proceedings, 14th In-ternational Cocoa Research Conference Accra, Ghana, 2003. 1349-1352.

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2242. Turner, P. D. (1960). Strains of Phytophthora palmivora (Butl.) Butl. from Theobroma cacao L. I. Isolates from West Africa. Transactions of the British Mycological Society 43: 665-672.

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2250. Turner, P. D. (1965). Effect of spacing and pruning on Phytophthora pod rot of cacao. Plant Disease Reporter 49: 257.

235

2251. Turner, P. D. (1965). Polyphenoloxidase activity in cocoa selections showing variable resistance to Phytophthora pod rot. Plant Disease Reporter 49: 317-321.

2252. Turner, P. D.; Asomaning, E. J. A. (1962). Root infection of Theo-broma cacao by Phytophthora palmivora. Tropical Agriculture 39: 339-343.

2253. Turner, P.D.; Lovi, N. K. (1961). Outbreaks and new records. Two new hosts for Trachysphaera fructigena. F.A.O. Plant Protection Bulletin 9:109-111.

2254. Turner, P. D.; Wharton, A. L. (1960). Leaf and stem infection of Theobroma cacao L. in West Africa, caused by Phytophthora palmivora (Butl.) Butl. Tropical Agriculture 37: 421-324.

2255. Turner, P. D.; joint author (1960). Phytophthora palmivora causing a leaf and stem blight of cocoa, by A. L. Wharton and P. D. Turner. Commonwealth Phytopathology News 6: p.13.

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2261. Vernon, A. J. (1966). The incidence of blackpod at Tafo in 1965. 2nd Working Party on Cacao Production, F. A. O., Rome, 1966. 16p. (PL Ca 66/28).

2262. Vernon, A. J. (1967). A survey of the shade status of Ghana cocoa: preliminary status. In: Conférence Internationale sur les Re-cherches Agronomique Cacaoyères, [Proceedings, 1st International

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2263. Vernon, A. J. (1967). New developments in cocoa shade studies in Ghana. Journal of the Science of Food and Agriculture 18: 44-48.

2264. Vernon, A. J. (1967). Yield and light relationship in cocoa. Tropical Agriculture 44: 223-228.

2265. Vernon, A. J. (1968). Edge effects in a cocoa shade and manurial ex-periment. Journal of Horticultural Science 43: 147-152.

2266. Vernon, A. J. (1969). The description of yield curves of multi-harvest crops. Journal of Horticultural Science 44: 13-25.

2267. Vernon, A. J. (1971). Canker: the forgotten disease of cocoa. Cocoa Growers’ Bulletin 6: 9-14.

2268. Vernon, A. J. (1971). Cocoa spacing, pruning and random death. In: Proceedings, 3rd International Cocoa Research Conference, Accra, Ghana, 1969. pp. 339-345.

2269. Vernon, A. J.; Morris, Marjory G. (1964). Variability in West African peasant cocoa farms; time studies on Agodi cocoa yields. Journal of Horticultural Science 39: 241-253.

2270. Vernon, A. J.; joint author (1965). Inter-varietal competition in cocoa, by D. R. Glendinning and A. J. Vernon. Journal of Horticultural Science 40: 317-319.

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2273. Voelcker, O. J. (1940). Cocoa die-back. Tropical Agriculture 17: 27-31.

2274. Voelcker, O. J. (1945). Aims and objects of the West African Cocoa Research Institute. In: Report and Proceedings of the Cocoa Re-search Conference held at the Colonial Office, London, May – June 1945. London, H.M.S.O. pp.109-110. (Colonial No. 192)

2275. Voelcker, O. J. (1947). Research work at the West African Cocoa Re-search Institute. Report of the 1947 Cocoa Conference, London. London, The Cocoa, Chocolate and Confectionery Alliance. pp. 20-24.

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2278. Voelcker, O. J. (1948). West African Cacao Research Institute: Field experiments. Empire Journal of Experimental Agriculture 16: 241-248.

2279. Voelcker, O. J. (1949). The implications of research at WACRI. Report of the Cocoa Conference held at Grosvenor House, London 30th August-1st September 1949 pp.57-58.

2280. Voelcker, O. J. (1950). WACRI, 1944-49. Tafo, Gold Coast, WACRI. 31p.

2281. Voelcker, O. J. (1950). West African Cocoa Research Institute 1944-49. Report of the 1950 Cocoa Conference, 12 – 14 Sept. 1950. Lon-don. pp. 61-70

2282. Voelcker, O. J. (1955). Cocoa husbandry. Report of the Cocoa Confer-ence held at Grosvenor House, London, 13th to 15th Septem-ber1955. London, The Cocoa Chocolate and Confectionery Alliance. pp. 14-16.

2283. Voelcker, O. J.; West, J. (1942). Swollen shoot and die-back of cacao. Tropical Agriculture 19: 83.

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2285. West African Cocoa Research Institute (1944). Annual Report, 1944-45 to 1961-62.

2286. West African Cocoa Research Institute. Division of Soil Science & Chemistry (1946). Detailed soil survey, produced under the direc-tion of Cecil Charter. Scale 12” to 1 mile. Tafo, Gold Coast. WACRI. 1 map.

2287. West African Cocoa Research Institute. Division of Soil Science & Chemistry (1946). Demonstration of the soil survey work being carried out. In: Cacao soils, good and bad by C. F. Charter. Tafo, Gold Coast, WACRI, 1947. 3p. (Appendix). Mimeographed.

2288. West African Cocoa Research Institute (1946). Discussion on cocoa survey and swollen shoot disease of cocoa at Aburi, 2nd Jan. 1946. Tafo, Gold Coast, WACRI.11p. Mimeographed.

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2289. West African Cocoa Research Institute (1948). Swollen shoot of ca-cao: how to recognise and control. A memorandum prepared by the West African Cacao Research Institute/ West African Cacao Re-search and Survey Advisory Committee on the symptoms of swollen-shoot disease with an evaluation of the control measures applied between 1940 and 1943 by the Department of Agriculture, Gold Coast, March 1945. Also issued as Appendix 3 of Sessional Paper No.1 of 1948.

2290. West African Cocoa Research Institute (1950). WACRI, 1944-1949. Tafo, Gold Coast, WACRI. 31p.

2291. West African Cocoa Research Institute (ca.1950). WACRI and the cocoa farmer. Tafo, Gold Coast, WACRI. 23p.

2292. West African Cocoa Research Institute (1959). WACRI Abstracts, nos. 1-6, 1057-1959. Quarterly. Mimeographed. WACRI, Tafo.

2293. West African Cocoa Research Institute (1962). Half Yearly Progress Report, No.1, Jan. – June 1962.

2294. West African Cocoa Research Institute. (1954-1961).Technical Bul-letin, Nos. 1-8. London: Crown Agents for Overseas Governments and Administration. Continued as Cocoa Research Institute of Ghana. Technical Bulletin, q.v.

2295. West African Cocoa Research Institute (1944). Quarterly Progress Report, Nos. 1- 63, July – September 1944, to July – September 1961. WACRI, Tafo, Gold Coast, Mimeographed.

2296. West, J. (1945). The development of cocoa selection in Nigeria. In: Re-port and Proceedings of the 1945 Cocoa Research Conference held at the Colonial Office, May-June 1945. London, HMSO. pp. 124-128. (Colonial No.192)

2297. West, J. (1947). Report on a visit to the Eastern Province of Nigeria and Southern Cameroon. 2p. Mimeographed.

2298. West, J. (1948). Cacao in the British Cameroons area. Report of Cocoa Conference held at Grosvenor House, London, 14th -16th Septem-ber, 1948. London, The Cocoa, Chocolate and Confectionery Al-liance. pp. 21-23.

2299. West, J. (1948). Cacao research at WACRI. Report of Cocoa Confer-ence held at Grosvenor House, London, 14th -16th September, 1948. London, The Cocoa, Chocolate and Confectionery Alliance. pp. 52-54.

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2300. West, J. (1949). Report on Cameroon Development Corporation cocoa areas, March 1949. 13p. Mimeographed.

2301. West, J. (1950). West African Cacao Research Institute, 1944-1949. Report of a Conference on Cocoa held at Grosvenor House, Lon-don, 13th and 14th September, 1950. London, The Cocoa, Choco-late and Confectionery Alliance. pp. 2-5.

2302. West, J. (1951). Progress of research at WACRI. Report of the Cocoa Conference held at Grosvenor House, London 11th to 13th Sep-tember 1951. London, The Cocoa, Chocolate and Confectionery Al-liance. pp. 108-111.

2303. West, J. (1951). Progress of work at WACRI on systemic insecticides carried out with Pest Control Ltd. Report of the Cocoa Conference held at Grosvenor House, London 11th to 13th September 1951. London, The Cocoa, Chocolate and Confectionery Alliance. pp. 86-89.

2304. West, J.; joint author (1942). Swollen shoot and die-back of cacao, by O. J. Voelcker and J. West. Tropical Agriculture 19: 83.

2305. Wharton, A. L. (1957). Black-pod disease - resistance and tolerance. In: Proceedings of the Cacao Breeding Conference held at The West African Cocoa Research Institute, Tafo, Ghana, 1st to 3rd Oc-tober 1956. pp.7-9.

2306. Wharton, A. L. (1958). The development and application of chemical control methods against black-pod disease (Phytophthora palmivora Butl.) in West Africa. West African Journal of Biological Chemistry 1: 111-117.

2307. Wharton, A. L. (1959). Blackpod and other cocoa diseases of immedi-ate or potential importance in West Africa. First FAO Technical Ca-cao Meeting, 4th Technical Session. 8th -15th February 1959, Accra, Ghana. 5p. Memeographed.

2308. Wharton, A. L. (1959). Problems of blackpod disease in Ghana. First FAO Technical Cacao Meeting, 4th Technical Session, 8–15 February 1959, Accra, Ghana. 2p. Memeographed.

2309. Wharton, A. L. (1962). Diseases and pests of cocoa: D. Blackpod and minor diseases. In: Agriculture and Land Use in Ghana, edited by J. B. Wills. London, Oxford University Press. pp. 333-342.

2310. Wharton, A. L.; Brunt, A. A. (1959). Galls of cocoa in Ghana. Com-monwealth Phytopathology News 5: 61-62.

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2311. Wharton, A. L.; Burge, G. A. (1960). Blackpod disease of cocoa in Ghana. Ghana Farmer 4: 18-23.

2312. Wharton, A. L.; Turner, P. D. (1960). Phytophthora palmivora caus-ing a leaf and stem blight of cocoa. Commonwealth Phytopathol-ogy News 6: 13.

2313. Wharton, A. L.; joint author (1957). Report on a visit to the British Cameroons, June 1957, to investigate leafless twig disease of co-coa, by R. G. Donald and A. L. Wharton. 8p. Mimeographed.

2314. Wharton, A. L.; joint author (1958). Studies on the host ranges of viruses from Theobroma cacao L., J. M. Thresh and A. L. Whar-ton. Annals of Applied Biology 46: 1-6

2315. Wharton, A. L.; joint author (1960). A gall disease of cocoa (Theo-broma cacao L.) in Ghana, by A. A. Brunt and A. L. Wharton. In: Proceedings of the 6th Commonwealth Mycological Conference, 1960, London, U.K. pp. 148-156.

2316. Wharton, A. L.; joint author (1960). Leaf and stem infection of Theo-broma cacao L. in West Africa, caused by Phytophthora palmivora (Butl.) Butl., by P. D. Turner and A. L. Wharton. Tropical Agricul-ture 37: 421-324.

2317. Wharton, A. L.; joint author (1960). Transmission of a gall disease of cocoa, by A. A. Brunt and A. L. Wharton. Nature18: 80-81.

2318. Wharton, A. L.; joint author (1961). Blackpod disease in Ghana: inci-dence of the disease in relation to levels of productivity, by J. W. Blencowe and A. L. Wharton. In: Proceedings of the 6th Com-monwealth Mycological Conference, 1960, London, U.K. pp. 139-147.

2319. Wharton, A. L.; joint author (1961). Galls of cocoa - a correction, by A. A. Brunt and A. L. Wharton. Commonwealth Phytopathology News 7: 44-45.

2320. Wharton, A. L.; joint author (1962) Calonectria rigidiuscula (Berk. and Fr.) Sacc. the cause of gall disease of cocoa in Ghana, by A. A. Brunt and A. L. Wharton. Nature193: 903.

2321. Wharton, A. L.; joint author (1962). Etiology of a gall disease of cocoa in Ghana caused by Calonectria rigidiuscula (Berk. and Fr.) Sacc., by A. A. Brunt and A. L. Wharton. Annals of Applied Biology 50: 283-289.

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2322. Wharton, A. L.; joint author (1962). The distribution and importance of a gall disease of cocoa in Ghana, by A. A. Brunt and A. L. Wharton. Commonwealth Phytopathology News 8: 44-46.

2323. Wickens, R. (1953). Cacao fermentation. In: Proceedings of the West African International Cacao Research Conference, held at the West African Cacao Research Institute, Tafo, Gold Coast, 12th to 16th De-cember 1953. pp. 67-68.

2324. Wickens, R.; joint author (1951). Application of an incomplete block design to the assessment of quality in cacao, by J. A. R. MacLean and R. Wickens. Nature168: 434-435.

2325. Wickens, R.; joint author (1951). Small-scale fermentation of cocoa, by J. A. R. MacLean and R. Wickens. Report of the Cocoa Con-ference held at Grosvenor House, London 11th to 13th September 1951. pp.116-122.

2326. Wickens, R.; joint author (1951). The assessment of cocoa quality by local “taste panels”, by J. A. R. MacLean and R. Wickens. Report of the Cocoa Conference held at Grosvenor House, London 11th to 13th September 1951pp.124-126.

2327. Wickens, R.; joint author (1953). The present position of research at WACRI on the preparation of cocoa and assessment of quality of the product, by J. A. R. MacLean and R. Wickens. Report of the Cocoa Conference, held at Grosvenor House, London, 1953. Lon-don, The Cocoa, Chocolate and Confectionery Alliance. pp. 34-39.

2328. Wickens, R.; joint author (1960). An investigation into the possible control of the mealybug vectors of cacao swollen-shoot virus by trunk implantation with dimefox, by A. D. Hanna, W. Heather-ington, H. R. Mapother and R. Wickens. Bulletin of Entomologi-cal Research 50: 209-225.

2329. Williams, G. (1953). Field observations on the cacao mirids, Sahlbergella singularis Hagl. and Distantiella theobroma (Dist.), in the Gold Coast. Part 1. Mirid damage. Bulletin of Entomological Re-search 44: 101-119.

2330. Williams, G. (1954). Field observations on the cacao mirids, Sahlbergella singularis Hagl. and Distantiella theobroma (Dist.), in the Gold Coast. Part 11- Geographical and habitat distribution. Bul-letin of Entomological Research 44: 427-437.

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Subject indexA

Acer species, 486,Acetic acid bacteria, 866, 867.Actara 240 SC, 1988.Adansonia digitata, 726, 1355.Africa, 675.Agodi, 2268.Agricultural credit, 638.Agricultural research, 1325.Agricultural technology, 992.Agriculture, 545, 738.Agroforestry, 574.

See also Cocoa AgroforestryAkantomyces, 1062.Albizia, 540, 541, 628, 972. Albizia zygia, 539, 548, 549, 550, 2187, 2188.Aluminium, 1399, 1561. Amazon Basin, 2058.Amazon cocoa

Ghana, 1188.growth, 833. incompatibility, 2032.manurial experiments, 322, 325.potassium deficiency, 73. pruning, 785, 1188.shade and fertilizer trial, 339, 703.shade and manurial experiment (K2-01), 322, 325.shaded, 768. swollen shoot disease/virus, effect of, 833.unshaded, 73. yield, 833.

See also Upper Amazon cocoa.Amelonado cocoa, 910, 1477, 1478.

climate, 910.fermentation, 401, 402, 405, 2083, 2086.Ghana, 1409, growth, 833, 1409.insect fauna, 768.irrigation of, 1260.manurial experiment (K1), 323.performance, 1192, 1193.physiology, 1260.polyphenols, 2084.pruning, 785. quality, 2084.root system, 315. shade and manurial experiment (K1), 323.spacing, 2135.yield, 833, 924, 1409, 1260.

Ammonia volatilization, 68.Anacardium occidentale see Cashew Anomis leona, 2111.

245

Anthocyanins, 1297.Antique, 627.Antiserum, 2109.Ants, 864, 1059, 1060, 1221. 1382, 1495.Aphids, 834, 1076.Arabusta coffee, 530,Arthropods, 195, 1059.Arylsulphatase activity, 578, 580.Ashanti, 733, 742.

BBacillus thuringiensis, 1014.Barley, 528. Barrier crops, 1603.Bassa 500 EC, 1988.Basta, 1739.Bathycoelia thalassina, 1434, 1940, 1954.

abundance, 1950, 1957.biology, 1497, 1941, 1942, 1944.control, 1497, 1941, 1953.damage, 1434, 1946, 1959.distribution, 1950.dispersal, 1951.ecology, 1942.egg production, 1948, 1956.feeding, 1959.flight, 1951.host plants, 1955.mating, 1956.natural enemies, 1439, 1947. parasitoid, 1962.

Beauveria bassiana, 50.Belgian Congo, 1537.Bifenthrin, 195. Biodiversity, 546, 883.Biotechnology, 1037, 1108.Biological control, 50, 817, 1536, 2149.Bixadus sierricola, 1986.Black citrus aphid, 1076.Blackpod disease, 355, 952, 1477, 1478, 1663, 2249, 2308.

control, 359, 360, 363, 676, 1231, 1654, 1655, 1656, 1659, 2305.epidemiology, 1058.farmer perception, 656, 1231.fertilizers, effect of, 950.forecasting, 954.fungicides, for control of, 672, 673, 1654, 1659, 1663.Ghana, 216, 355, 359, 360, 363, 670, 671, 676, 773, 938, 941, 942, 944, 948,

950, 953, 956, 959, 960, 1057, 1405, 1664, 1231, 2260, 2307, 2310,

inoculum, 943.isolates, 685.incidence, 95, 773, 950, 1405, 1423, 2260.losses from, 1419.pattern, 504, 942, 956.

246

phosphonic acid, to control, 1656.Blackpod disease, (continued)

potassium phosphonate, to control, 1655.resistance, 4, 216, 504, 506, 509, 680, 935, 942, 956, 1649, 2248, 2250, 2304.roots, on, 683.shade, effect of, 950.soil, in, 952.tolerance, 2304.transmission, 1056. weather, and, 941, 953.West Africa, 2306. yield, effect on, 3, 956.See also Phytophthora megakarya and Phytophthora palmivora

Bole, 1785, 2236.Boron, 270, 701, 702, 1399.Botanical pesticides, 1989, 1990.British Cocoa Swollen Shoot Project, Ghana, 1354.

CCacao see: CocoaCalcium, 852, 1394, 1396.Calonectria rigidiuscula, 845, 846, 912, 1870.Cambial tissue, 630. Cameroon Development Corporation, 2299.Cameroons, 810, 982, 2271, 2296, 2297. Canadian Team on Mirid Resistance, 2062.Canker, 560, 936, 955, 1651, 1661, 2266.Capsids see MiridsCarbaryl, 2012.Carbohydrate, 123, 150, 420.Cashew (Anacardium occidentale), 1012, 1686, 2162.

germination, 416,growth, 416, 1689.insect pests, 1007, 1008, 1009, 1010, 1011.

biological control, 1012.pulp, 1548.transplanting, 1687.tree gum, 1181-1184.

Cassava, 1084.Castor, 23.Cataulacus guineensis, 40.Cattle, 1548, 1785, 2236.Cecidomyiid midge, 1287.Celite, 125.Central Cocoa Research Station, Tafo, 884, 869.-872, 1167, 2331. Cephalosporium sp., 2096.Ceratopogonid midge, 815.Ceratopogonidae, 1289.Characoma stictigrapta, 350-353.Cherelle wilt, see Cocoa cherelle wiltChicken, 156, 727, 983, 1484, 1552, 1781. Chlorpyrifos, 1014.

247

Chocolate, 1135, 2089, 2090.Cholinesterase inhibitors, 1491.Chromolaena odorata, 1733.Cirina forda, 1004, 1013. Clay minerals, 311.Climate, 545, 953, 1691-1693.Coccid pests, 865, 2151.Cocoa, 134, 2065, 2281.Cocoa agroforestry, 411, 1794, 1798.Cocoa agronomy, 1257.Cocoa alleles, 1150.Cocoa bark, 123.Cocoa bean,

characteristics, 103, 1420,drying, see Cocoa dryingfermentation see Cocoa fermentationflavour see Cocoa flavourgermination, 90, 412, 415, 998.insect infestation, 1523,insecticide residues/taint, 128, 129, 130, 164, 1952, 1964, 1984, 2010.per pod, 1143.processing, See Cocoa processingquality, 152, 523, 533, 534, 993, 1336, 1479, 1481, 1482, 2084, 2164.size, 996, 998, 1143.shape, 1143.viability, 333, 1501.

Cocoa breeding, 1127, 1518, 2076, 2165. blackpod resistance, 4, 509, 680, 216.Cocoa Research Institute of Ghana, 4, 208, 209, 211, 502, 770, 771, 1145, 1146,

1148, 1152, 1410, 1414, 1421, 1508.cocoa swollen shoot virus resistance/ tolerance, 99, 106, 214, 219, 226, 229, 230,

1231, 1305, 1410, 1414.drought resistance, 1079, 1080.improved varieties, 100.material, 725, 915, 1138, 1513.mutation breeding, 207, 209, 219, 226, 230, 231.population breeding, 104, 213. WACRI, 753, 1132, 1138, 1146, 1513, 2077.West Africa, 1129.

Cocoa butter fat, 986.Cocoa by-products, 126, 127, 133, 139, 142, 143, 144, 145, 147, 158, 159, 160, 305.Cocoa canker, 560, 936, 955, 1651, 1661. 2266.Cocoa canopy, 763, 908, 995, 1270, 1654.Cocoa carbohydrate metabolism, 150.Cocoa cherelle wilt, 24, 25, 1185, 1334, 1437, 1511, 1515.Cocoa climate, 545, 796, 797, 910, 953, 1119.Cocoa clones, 227, 503, 692, 868, 1040, 1149, 1190, 1404.Cocoa coccid pests, 865, 2151.Cocoa copper deficiency, 1392.Cocoa coppicing experiments, 1366, 2199, Cocoa crinkle leaf mutant, 218.Cocoa cultivars, 413, 489, 680, 1072, 1336, 2058.Cocoa cultivation, 731, 742, 875, 885, 918, 1805.Cocoa cuttings, 417, 418, 420, 629, 631, 633, 1190, 1512, 1514, 2071.

248

Cocoa die-back, 2272, 2282, 1295,Cocoa diploid, 1504.Cocoa diseases, 675, 739, 741, 832, 913, 970, 1267, 1268, 1279, 1660, 1869, 2217,

2256. See also: Cocoa fungal diseases, Cocoa gall diseases, Cocoa viruses, and specific

names of cocoa diseases Cocoa drought tolerance, 1079, 1080, 1082,Cocoa drying, 166, 404, 2087.Cocoa economy, 365, 2067.Cocoa ecosystem, 271, 1793, 1798, 1972, 1974, 2339.Cocoa entomology, 901, 1379, 1381, 1960, 2154, 2155.Cocoa environment, 25, 89, 321, 418, 1185, 1256, 1499.Cocoa enzymes, 1240.Cocoa establishment, 72, 400, 406, 422, 432, 493, 755, 756, 928, 1081, 1085, 1564,

1696, 1724, 1736, 1737, 1800, 1805, 2136.Cocoa extension services, 485, 637, 730, 739, 744, 1325, 1814.Cocoa farmers, 141, 358, 364, 521, 523, 655, 656, 728, 729, 730, 731, 732, 733, 735,

739, 742, 744. 1231, 1325, 1725.women, 636.

Cocoa farming, 1562, 1811, 1812, 1813.Cocoa farms, 40, 43, 44, 71, 359, 411, 492, 1121, 1379, 1385, 1557, 1562, 1685, 1965,

2268.Cocoa fermentation, 152, 166, 522, 533, 758, 759, 993, 1241, 1306, 2087, 2088, 2089,

2322.Amelonado cocoa, 401, 402, 405, 2083, 2086.heap, 866, 867, 2086.single pod, 1475.small scale, 1480, 2085.tray, 401, 403. with placenta, 2163.

Cocoa fertilisation, 227, 2270.Cocoa flavour, 759, 1147, 1216.Cocoa flushing, 146, 489, 795, 1171.Cocoa foliar analysis, 66, 67, 334.Cocoa fungal diseases, 356, 949, 2256.Cocoa gall disease, 842.-847, 2309.Cocoa genotypes, 45, 95, 96, 1648, 1661.Cocoa germination, see under Cocoa beanCocoa germplasm, 212, 215, 217, 1407, 1421, 1682, 1684.Cocoa growth, 321, 413, 414, 426, 700, 786, 791, 833, 898, 925, 996, 997, 1134, 1149,

1162, 1163, 1164, 1256, 1394, 1395, 1397, 1409, 1443, 1444, 1554, 1556, 1595, 1726, 1727, 2270.

Cocoa hybrids, 98, 99, 107, 109, 489, 994, 1038, 1039, 1040, 1128, 1154, 1408, 1409,

1411, 1801, 1817.Cocoa incompatibility, 220, 227, 1133, 1150, 1329, 1412, 1419, 2020, 2032.Cocoa industry, 576, 582, 652, 744, 1367, 1658, 1806, 1807.Cocoa insects see under InsectsCocoa intercropping

coconut, 1558, 1816.food crops, 1696, 1800.

249

oil palm, 421, 422.Cocoa interplanting see Cocoa intercropping Cocoa inter-varietal competition, 1156.Cocoa introductions, 2, 1128, 1330.Cocoa iron deficiency, 1169.Cocoa land preparation, 72, 399, 400, 406, 928.Cocoa lands, 548. Cocoa leaf, 67, 120, 125, 163, 218, 353, 704, 838, 852, 1018, 1160, 1170, 1240, 1335,

1397, 1399, 1551, 1555, 1565, 2253.Cocoa leaf blight, 963, 2311.Cocoa leafless twig disease, 982.Cocoa manurial experiments, 322, 323, 325, 326, 926, 927, 930, 1250, 2264.Cocoa manuring, 88, 879, 880.Cocoa meristem–tip culture, see: Cocoa shoot tip-culture Cocoa mineral deficiency, 1168-1170, 1392, 1393, 1395, 1396, 1397.Cocoa mottle leaf virus, 836, 1155, 1300.Cocoa mould, 2161.Cocoa necrosis virus, 163, 1875, 1299.Cocoa nursery, 333, 996, 1556.Cocoa nursery diseases, 682. Cocoa nutrition, 65, 66, 67, 321, 334, 413, 414, 693, 696, 918, 921, 922, 929,

1393-1397, 1400.Cocoa pastries, 1774.Cocoa pectin, 121, 122, 124, 167, 1175.Cocoa pests, 675, 739, 741, 808, 817, 1054, 1231, 1267, 1268, 1279, 1382, 1438, 1887,

1996, 2217.Cocoa plant

carbohydrate metabolism, 150.photosynthesis, 1256. physiology, 417, 705, 1252, 1254, 1255, 1257, 1259.

Cocoa plantations, 320, 327, 539, 549, 1119, 1537, 2147. Cocoa planting

at stake, 1730.high density, 218,

Cocoa planting material, 1, 98, 364, 1685, 1887.Cocoa pod, 24, 90, 93, 333, 353, 489, 701, 1143, 1420, 1434, 1501, 1511, 1563, 1654,

1743, 1869, 1946.Cocoa pod husk,

ash, 155, 581, 585,breeding substrate for Forcipomyia midges, 814.chemical composition, 984.compost, 1552.fertilizers, 330, 331, 337, 585. livestock feed, 154, 156, 157, 161, 167, 727, 752, 984, 1037, 1484, 1546, 1547,

1594, 1781, 1784, 2232, 2234, 2235.pectin, 121, 122, 167,soap, 155, 654.

Cocoa pollen, 227, 529,Cocoa pollination, 813, 814, 815, 816, 819, 1040, 1045, 1139, 1286-1293, 1153, 1972,

2023, 2028, 2033, 2037, 2043, 2113, 2159.Cocoa polyphenols, 2084.

250

Cocoa polyploidy, 1327.Cocoa powder, 1774. Cocoa price, 521, 653.Cocoa processing, 126, 142, 534, 1037, 1241, 1482, 2085, 2086.Cocoa processing plants, 699.Cocoa production, 149, 321, 545, 546, 649, 653, 655, 728, 783, 788, 1278, 1663.

Ghana, 583, 584, 586, 694, 737, 817, 879, 916, 1881, 1886, 1996, West Africa, 650.

Cocoa progenies, 46, 52, 762, 763, 103, 1074, 1360, 1415, 1420, 1422, 2039.Cocoa propagation, 419.

media, 412, 413.vegetative, 1191, 1516.

cuttings, 417, 418, 420, 629, 631, 633, 1190, 1512, 1514, 2071.Cocoa pruning, 493, 785, 1188, 1801, 2249, 2267,Cocoa quality, See under Cocoa beanCocoa quarantine, 1882, 2196.Cocoa random death, 2267. Cocoa rehabilitation, 335, 338, 492, 902, 1243.Cocoa research, 127, 133, 141, 356, 575, 576, 695, 697, 734, 788, 798, 808, 1109,

1231, 1266, 1344, 1482, 1505, 1507, 1524, 1532, 2019, 2031, 2040, 2059, 2063, 2067, 2184, 2185, 2194, 2274, 2277, 2278, 2298, 2301.

Cocoa Research Institute of Ghana, 141, 573, 637, 828, 1166, 1814, 1960.Recommended technologies, 149, 728, 985, 1724, 1806.

Cocoa Research Institute of Nigeria, 721.Cocoa roots, 314, 315, 319, 2246.Cocoa rootstock, 218.Cocoa seed gardens, 364, 1038, 1039, 1040, 1145.Cocoa seeds See Cocoa beanCocoa seedlings, 274, 419, 947, 1086, 1740.

development, 90, 412, 415, 945, 996, 1161,establishment, 422, 1085.growth, 413, 414, 426, 700, 996, 997, 1162, 1163, 1164, 1394, 1726, 1727, 1733.light, effect of, 1164, 1932.moisture stress, 414, 1085, 1086.nutrient uptake, 413, 414.potting medium, 332, 413.shade, effect of, 700.survival, 425, 1727. transplanting, bare root, 424, 425, 426.twinning, 2024.

Cocoa selection, 97, 101, 105, 108, 109, 820, 1145, 1146, 1360, 1362, 1648, 2025,2250, 2271, 2295.

Cocoa shade, 146, 318, 700, 768, 852, 862, 917, 918, 925, 926, 929, 950, 996, 998, 1398, 1399, 1563, 1595, 1795, 2064, 2261, 2262.

and fertilizer, 318, 324, 339, 698, 703, 787, 789, 862, 917, 922, 950. and manurial experiments, 322, 323,325, 326, 926, 927, 930, 1250.requirements, 698, 922, 929.spacing/cultivar experiment, 489.temporary, 547, 1084, 1647.unshaded, 73, 768, 925, 950, 1115, 1563, 2064.

Cocoa shade trees, 411, 540, 541, 547, 550, 1653, 1805, 2188.Cocoa shield bug see Bathycoelia thalassinaCocoa shoot-tip culture, 222, 224.Cocoa soils see under Soils

251

Cocoa somatic embryos, 225.Cocoa spacing, 23, 489, 493, 1795, 2135, 2249, 2267.Cocoa stem borers (Eulophonotus myrmeleon), 194, 196-198, 1987.Cocoa stem pitting, 1369.Cocoa sterility, 1328.Cocoa sweatings, 153, 165, 993, 1174.Cocoa swollen shoot badnavirus see Cocoa Swollen shoot virus diseaseCocoa swollen shoot virus/disease, 107, 700, 705, 757, 833, 1019, 1028, 1406,

1217-1220, 1244, 1252, 1302, 1305, 1350, 1351, 1352, 1354, 1358, 1359, 1362, 1363, 1364, 1365, 1367, 1389, 1395, 1406, 1414, 1416, 1417, 1442, 1444, 1445, 1487, 1530, 1598, 1604,1607,1877, 1884, 1888, 1975, 1985, 2026, 2096, 2099, 2101, 2103, 2109, 2154, 2155, 2192, 2195, 2197, 2198, 2200, 2201, 2202, 2205, 2282, 2287.

control, 976, 977, 1021, 1026, 1027, 1221, 1353, 1366, 1368, 1390, 1349, 1368, 1390, 1410, 1600, 1603, 1612, 1804, 1876, 1885, 1889, 2026, 2192, 2198, 2199, 2200, 2288.

detection, 135, 140, 151, 1020, 1023, 1215, 1238, 1240, 1245, 1602, 2099, 2101, 2103, 2109, 2110, 2219, 2288.

diagnosis, 1018, 1022, 2015, 2029, Ghana, 488, 757, 1050, 1155, 1353, 1356, 1367, 1368, 1416, 1417, 1418, 1596,

1598, 1600, 1604, 1606, 1608, 1612, 1613, 1876, 1877, 1878, 1884, 1888, 1889, 1975, 1977, 2200.

Gold Coast, 1220, 1221, 2219.hosts, alternative, 1028, 2214, 2218, 2228.inhibition, 1021.isolates, 836, 1238, 1239, 1596, 2098, 2100, 2100, 2101, 2102, 2103, 2109,

2197.mild strain protection, 1246, 1601,1605,1606,1609,1610,1611,1886. Nigeria, 1296, 1389, 1390, 1441, 1442, 1444, 2195, 2197, 2198, 2199. properties of virus, 840, 841, 1301, 2098, 2255.purification of virus, 125, 135, 151, 838, 1024, 1301.resistance of cocoa, 99, 105, 106, 131, 207, 214, 219, 226, 228, 229, 230, 231,

1304, 1360, 1416, 1418.Sierra Leone, 723,spread, 1349, 1366, 1608, 1613, 2193, 2199.strains, 1597, 1602, 1605, 1610, 2215.Togo, 1883.tolerance, 106, 1155, 1302, 1357, 1358, 1360, 1361, 1441, 1874.transmission, 2021,

mechanical, 162, 834, 835, 836, 837.vectors, 812, 860, 1051, 1879, 2092, 2154, 2155.see also mealybugs

West Africa, 812, 1304, 2192, 2205, 2215, 2218.Cocoa technologies, 148, 149, 358, 638, 639, 649, 728, 1298, 1806, 1807.Cocoa tetraploid, 1504, 1506.Cocoa thread blight, 679, 1380.Cocoa varieties, 99, 100, 101, 106, 275, 319, 493, 505, 767, 995, 1087, 1130, 1131,

1134, 1136, 1137, 1138, 1140, 1141, 1142, 1144, 1146, 1147, 1149, 1151, 1154, 1156, 1358, 1364, 1397, 1406, 1408, 1411, 1554, 1795, 2075, 2201, 2075.

Cocoa viruses/diseases, 718, 726, 839, 945, 969, 970, 1265, 1303, 1331, 1599, 2031,

2041, 2045-2047, 2206, 2203, 2204, 2206, 2216. cross-immunity, 914.Ghana, 724, 725, 906, 908, 909, 975, 1880.Gold Coast, 907.hosts, 720, 1355, 2036, 2046, 2206, 2220, 2036.

252

Nigeria, 2194.quarantine, 2196.resistance/ tolerance, 724, 725, 969.Sierra Leone, 722, 772, 975.

Cocoa viruses/diseases, (continued)spread, 2193.transmission, 2094. Trinidad, 2030.vectors, 906, 907, 908, 909, 1055. 1355, 2152.

See also mealybugsWest Africa, 914, 1162, 2031, 2035, 2038, 2041, 2045, 2046, 2047, 2049,

2050, 2152, 2196.See also: Cocoa necrosis virus, Cocoa swollen shoot virus and Cocoa yellow

mosaic virusCocoa wastes, 139, 142, 145, 159.

See also Cocoa by-productsCocoa water relations, 698, 911, 1085, 1122, 1258.Cocoa yellow mosaic virus, 840.Cocoa yield, 3, 72, 96, 99, 101, 102, 108, 325, 422, 426, 432, 493, 691, 786, 789, 792,

795, 833, 851, 868, 898, 924, 995, 1134, 1149, 1189, 1409, 1411, 1423, 1515, 1555, 1743, 1261, 1795, 1800, 1972, 2064, 2078, 2259, 2263, 2265, 2268.

Coconut, 1558, 1816.CODAPEC, 1662.Coffea canephora, see Robusta coffeeCoffee, 41, 270, 490, 491, 578, 793, 1015, 1814.

berry borer, 1015.breeding, 221, 535.CRIG recommended technologies, 148, 149, cultivation, 479.diseases, 357, 958, 962. drying, 1456.fertilizer, effect of, 1015.germination, 1803, 1815.Ghana, 894, 958.growth, 423, 430, 431.insect pests, 1015, 1973, 1976, 1978, 1983, 1991.intercropping with oil palm, 423. production, 148, 149, 894.quality, 1456.ramets, 1865.rooting, 1592, 1593. shade, 423, 1592. spacing, 423.stem borer, 1986. weed control, 1694, 1732, 1729.1739, 1743.yield, 423, 1743.See also Arabusta coffee and Robusta coffee

Cola chlamydantha, 1355.Cola nitida

diseases, 675.fruit setting, 1779, 1780.genotype, 542.germination, 542, 824, 825, 1779, 1796.germplasm, 5.

253

growth, 542, 1779.

Cola nitida, (continued)nut, chemical composition, 1453. colour, 1779. preservation, 2166. processing, 642, 1453. storage, 1453, 1797.pests, 675,propagation, 22, 427.yield, 542, 799, 1780.

Colletotrichum leaf blight, 963.Commelina, 1018.Confidor, 51, 1008.Copper, 1392, 1399.Coppicing experiments, 1366, 2199.Cordyceps, 1065.Cotton stainer, 2053.Crematogaster ants, 1221.Crematogaster clariventris, 864.Crematogaster spp., 859.Creontiades dilutes, 1458.CRIG dam, 1483.CRIG series II, 886.CRIG cocoa varieties, 1140, 1142, 1397.

See also WACRI varietiesCrosidosema plebjana, 1457.Crown rust disease, 94, 2074.Cyclodiene insecticides, 1949, 2013, 2189.Cylindromyia cribrata, 1962.Cyperdim, 1008.

DDahomey, 810.Desplatsia dewevrei, 1997.D.D.T., 1525.Dimefox, 1218.Distantiella theobroma, 911.

control, 1945, 1958, 2070.feeding, 1122.Gold Coast, 2328-2330.insecticide, 989, 2054, 2056.movement, 1969.parasitism, 1326.predators, 1492.rearing methods, 2055, 2069.sex attractants, 1992.sex pheromone, 1995.

Djallonke sheep, 1546, 1784, 2235.

254

DNA probes, 2099.Drevici processing plant, 699.Dysdercus spp. 2053.

EEarias huegeliana, 1457, 1459.Eastern Region, Ghana, 738, 1405, 1408, 1410, 1877.Eastern Region Cocoa Project, 1876.ELISA, 1020, 1023, 2109, 2110.Empoasca spp., 1436.Entomology, 901, 1379, 1381, 1960, 2093, 2154, 2155.Entomopathogens, 50.Enzyme-linked immunorsorbent assay see ELISAEnzymes, 1241, 2340.Ephestia cautella, 1523.Ephestia elutella, 1523.Epicampoptera ivoirensis, 1978.Epicampoptera strandi glauca, 1976.Epiphytes, 26.Ethiopia, 736, 743, 745, 746.Eulophonotus myrmeleon see Cocoa stem borer

FFarmers, 1, 736.

See also Cocoa farmersFarming systems, 627, 743, 745, 746, 1277, 1868.Fenobucard, 1988.Fermentation see Cocoa fermentationFertilizers, 71, 72, 320, 324, 338, 339, 573, 582, 698, 703, 787, 789, 852, 862, 917, 923,

924.1015, 1398, 1399, 1556, 1559, 1663, 1690, 2147.See also names of fertilizers

Flemingia macrophylla, 547, 1738.Foliar analysis, 66, 67, 334.Food security, 328, 2342.Forcipomyia midges, 814, 816, 819.Forcipomyia squamipennis, 1288, 1291, 1293. Forest soils, 880, 919, 920.Fungal diseases, 949.Fungi, 354, 719, 1059, 1061-1066, 2096, 2256, 2283.Fungicides, 363, 672, 673, 951, 1233, 1234, 1236, 1237, 1654, 1659, 1663, 2113.

See also names of fungicidesG

Gaeumannomyces-Phialophora complex, 354, 2283.Gall diseases, 632, 842.-847, 2309.Gamma-BHC, 881.Gamma irradiation, 230, 231, 219, 2166.Garlon 2, 1722.

255

Gas chromatography, 2090, 2339.Gel electrophoresis, 1975, 1977.Germination, 40, 412, 415, 416, 542, 550, 824, 825, 998, 1779, 1796, 1803, 1815,

2015.Germplasm, 5, 210, 212, 215, 217, 754, 1407, 1421, 1682, 1684.

Ghana, 2, 4, 26, 44, 46, 49, 50, 65, 70, 71, 72, 73, 95, 98, 99, 100, 103, 107108, 109, 127, 132, 133, 137, 143, 146, 147, 155, 157, 160, 166, 194, 198, 208, 209, 210,212,213, 214, 215, 216, 217, 221, 270, 312, 316-318, 324, 315-327, 335, 336, 338, 339, 340, 351, 352, 353, 355-360, 362-364, 411, 421, 428-431, 479, 484, 487, 488, 492, 509, 512-523, 5530, 531, 534, 535, 539, 540, 544, 570, 571, 574-576, 578-580, 582-587, 636, 637, 651, 652, 670, 671-673, 676, 678, 680, 682, 691, 693, 694-697, 720, 724-726, 728, 730-735, 737-742, 744-746, 754, 760, 770, 771, 773, 783-785, 798, 801, 802, 813, 814-819, 827, 828, 831, 833, 834, 842, 845-847, 851, 861, 863, 864, 866, 867, 882, 883, 906, 908, 916, 918, 921, 922-923, 926, 927, 929,930, 935, 937, 938-944, 946, 948, 950, 953, 955, 956, 958, 959-961, 963, 975, 992, 1004-1008, 1011, 1014, 1018, 1026, 1027, 1039, 1046, 1047, 1050, 1051, 1054, 1057, 1059-1066, 1068, 1069, 1075, 1077, 1079, 1115, 1116, 1119, 1123, 1151, 1155, 1184, 188, 1194-1197, 1231, 1246, 1250, 1258, 1260, 1266, 1269, 1271, 2261, 2262, 2307, 2309, 2310, 2342.See also under various subjects

Ghana National Cocoa Diseases and Pests Control Programme see CODAPEC.

Gibberellins, 1335.Gibellula, 1061.Gimbo Woreda, 743, 745, 746.Gliricidia sepium, 273, 543.Glufosinate ammonium, 1739.Glyphosate, 1734, 1737.Goats, 2233.Gold Coast, 811, 878, 879, 880, 907, 980, 1169, 1220, 1221, 2023, 2025, 2027, 2037,

2039, 2040, 2153, 2184, 2219, 2328, 2329, 2330. Gomoah-Dawurampong, 654.Groundnuts, 834.Greenhouse, 1400.Ground covers, 72.Guinea, 1378, 2150Guinea savannah, 1782, 1785.

HHelopeltis schoutedeni, 1007, 1008, 1009, 1010. Herbicides, 487, 490, 826, 1455, 1460, 1732, 2113. Home gardens, 754, 2342.Homoptera, 45, 46, 97, 861, 862, 863, 864, 1060.Honeydew, 123, 863.Hordeum vulgare, 528.Hybrid cocoa see Cocoa hybridsHybridization, 1500, 1502.Hymenostilbe, 1063.Hyperaspus egregia, 42.Hypothenemus hampei, 1015.

256

IICPCR see: Immunocapture polymerase chain reactionIEM see: Immunoelectron microscopyImidacloprid, 195Immunocapture polymerase chain reaction, 2101, 1238.Immunoelectron microscopy, 2109.In vitro culture, 207, 223, 225, 226, 630, 1191.INCOPED see International Working Group on Cocoa Pests and DiseasesInositol phosphate, 572, 577, 587, 1197.Insectary, 2069.Insects,

control, 50, 818, 1536, 1968.cashew, 1007, 1010, 1011.cocoa, 45, 46, 91, 97, 351, 352, 353, 762, 763, 764, 767, 768, 818, 860, 861, 862,

863, 864, 865, 901, 902, 1052, 1053, 1054, 1070, 1115, 1121, 1294, 1384, 1437, 1438, 1523, 1526, 1528, 1529, 1954.

coffee, 1973, 1983, 1991.phenology, 1121. populations, 765, 769, 1111. shea nut, 1006. See also names of specific insects

Insecticides, 47, 91, 881, 989, 1054, 1116, 1117, 1120, 1269, 1271, 1493, 1494, 1496, 1497, 1943, 1952, 1964, 1965, 1966, 1968, 1972, 1976, 1984, 2010, 2012, 2013, 2054, 2056.

Systemic, 1217, 1219, 1220, 1530, 1532, 1535, 1538, 1540, 2302.See also names of individual insecticides

Institut Français du Café et du Cacao (IFCC), 1883.Integrated control, see Integrated Pest ManagementIntegrated Pest Management, 729, 729, 1887, 1953, 1973, 1963, 1985, 1986, 1996.Intercropping, see Cocoa intercroppingInternational Capsid Research Team, 897, 899, 900, 1264.International Working Group on Cocoa Pests and Diseases, 365.Irrigation, 852, 991, 1260, 1398, 1399.Iron, 1169, 1399.Isoenzyme gel electrophoresis, 1977.

KKakum Forest Reserve, 1812, 1813.Karate, 1008.Kefa-Sheba zone, 736, 746. Kola see Cola nitidaKumba Corridor, 1325.

LLactic acid bacteria, 866, 867.Lambda-Cyhalothrin, 1014.Lasioglossum sp., 1290.Latosol soils, 578. Leaf litter see LitterLeafless twig disease, 982.Leguminous plants, 1564, 1808.

257

Lepidoptera, 2134.Light, 146, 705, 1083, 1932, 2263.Lindane, 1496, 1974, 2013. Litter, 269, 1551, 1563, 1567.Lolium perenne, 2074.Lukolela Plantations, 1537.

MMagnesium, 852, 1396. Malaysia, 1018.Manganese, 1399.Mango, 632.Mealybugs, 760, 761, 858, 859, 861, 863, 1050, 1074, 1874, 2092, 2094, 2095.

behaviour, 907, 1055.biology, 1046, 1047, 1048, 1980. control, 1049, 1217-1219, 1221, 1530, 1534-1536, 1982, 1985, 2096.distribution, 858, 903, identification, 1975, 1977, 1979, 1998.migration, 903.nutrition, 123. parasitism, 2048. parthenogenesis, 1980.population, 766, 903.rearing, 1071.

Mealypod, 684, 937, 951. Meloidogyne incognita, 686.Meristem-tip culture, See Cocoa shoot tip-culture Mesohomotoma tessmanni, 1383.Methyl bromide, 128-130.Microbiology, 883.Microsatellites, 2165.Midges, 814, 815, 816, 819, 1287.Mirids, 895, 898, 1533, 1537, 2066, 2068.

and cocoa swollen shoot virus/disease, 1296, 1382, 1495, 2195.Belgian Congo, 1537.Cameroons, 810.control, 50, 881, 895, 896, 902, 1961, 981, 1114, 1118, 1231, 1270, 1496, 1531,

1537, 1945, 1958, 1961, 1963, 1966, 1967, 1981, 1985, 1989, 1993, 2011, 2012, 2070, 2258, 2259,

damage, 1270, 2328.digestive system, 1165.Ghana, 898, 1123, 1231, 1382, 1945, 1949, 1958, 1961, 1985, 1988, 2011, 2013,

2189, 2190.Gold Coast, 2184, 2328, 2329, 2330. Guinea region, 2150.insecticides, 881, 1120, 1269, 1271, 1943, 1958, 1966, 1990, 2012, 2054, 2056.

resistance, 989, 1116, 1949, 2013, 2062, 2189, 2190. lesions, fungi associated with, 2256.movement, 1969.Nigeria, 981, 1296, 2195.parasitism, 1326, 1337.pheromone, 1458, 1993, 1995, 2112.population, 1123, 2183.rearing, 2055, 2069.sex attractants, 1992.

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West Africa, 808, 810, 897, 1118, 1120, 1165, 1264, 1529, 2258.Mistblowers, 882.

See also Spraying machinesMistletoe (Tapinanthus bangwensis), 561, 1868, 2014, 2015.Molecular markers, 1682.Monoclonal antibodies, 1239.Morphometric analysis, 1975.Mulches, 48, 272, 432, 1086, 1738.Mutants, 218, 219, 230, 231.

NNeem extracts, 1989.Nephopterix sp., 1005.Nigeria, 810, 981, 1233-1237, 1294, 1296, 1389, 1390, 1441, 1442, 1444, 2194, 2195,

2197-2199, 2275, 2295, 2296.Nitrate, 1396.Nitrogen, 68, 123, 271, 541, 547, 852, 919, 991, 1015, 1394, 1396.Nitrogen fertilizer, 69, 274, 1555.Nitrogen-15, 274.Nomuraea, 1064.NPK fertilizer, 23, 950, Nucleic acid hybridization, 2103, 2104.Nutrition, 65, 66, 67, 123, 158, 321, 334, 694, 696, 918, 1393-1397, 1400.

OOchratoxin, 2161.ODA, 1243.Oecophylla longinoda, 859, 1012.Offinso, 1230. Oil bearing seeds, 1476.Oil palm, 421, 422, 423, 793, 1545.Okro, 1014.Organochlorine, 1454.Ortho-bux, 1974.Oxyfluorfen, 1740.Oyster mushroom, 1037.

PP-32, 273, 274, 314, 315, 320, 905, 904. Paclobutrazol, 994, 995.Paecilomyces, 1064.Paraserianthes, 549, 628, 972.Paria Peninsula, 2044.Pastries, 1774.Pectin, 121, 122, 124, 136, 167, 1175.Pentadesma butyracea, 132.Pest control, 1231, 1382, 2185.Pest management, 652, 739, 1279. Pesticides, 269, 1452, 1454, 1990, 2336, 2337, 2338.

See also: names of various pesticidesPests, 48, 97, 675, 739, 741, 767, 808, 810, 817, 818, 865, 902, 970, 1053, 1054, 1070,

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1267, 1268, 1438, 1524, 1526, 1973, 1974, 2217, 2256, 2308.Pheidole megacephala, 864.Phenacoccus manihoti, 1879.Phenolic compounds, 131, 1240.Phenology, 1121, 1384.Pheromones, 1457, 1458, 1459, 1993, 1995, 2112.Philippines, 627, 983.Phosphatase activity, 571, 572, 577, 581, 587.Phospholipid P, 1194.Phosphonic acid, 1242, 1656.Phosphorus, 65, 271, 275, 312, 570, 571, 587, 588, 852, 1195, 1196, 1396, 1565, 1566,

1567. Phosphorus fertilizer, 274, 275, 318, 1566, 1567.Photosynthesis, 1256.Phytophthora, 2097.

bean invasion, 361.canker, 1651, 1661.pod invasion, 361.pod rot, see Blackpod disease

Phytophthora megakarya, 364, 656, 2104, blight, 2311.cankers, stem, 560.control, 363, 1242, 1471, 1654, 1656.detection, 2104.epidemiology, 1471.Ghana, 1472, 1645, 1650, 1651, 1658.hosts, 1653.identification, 1471, 2104.isolates, 1644.resistance, 1648.roots, in, 1643, 1665, 1666, 2251.soils, in 1643, 1644.sporangia, 1485, 1646.spread, 362, 1647, 1650, 1652.zoospores, 1646.

Phytophthora palmivora, 674, 681, 682, 817, 945, 1405, 1648, 2237, 2238, 2242, 2246, 2253.

blight, 2311.cankers, 560, 936, 955.control, 672, 673, 1233-1237, 1656.detection, 2104.fungicides, 672, 673, 1233-1237.Ghana, 670, 673, 940, 961.1057, identification, 2104.inoculation, 670, 677, 681, 943.isolates, 940, 957, 1644, 2239, 2241, 2243, 2244.isolation, 936. Malaya, 2239.Nigeria, 1233-1237. oospores, 939, 940.resistance, 216, 503, 504, 505, 506, 507, 508, 680, 692, 1648.roots, in, 1643, 1665, 1666, 2251. soils, in, 946, 952, 1643, 1644, 2247.sporangia, 1485, 1646.spores, 2246.

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strains, 2240, 2241, 2244, 2245.vectors, 817, 1057.West Africa, 2240-2242, 2245. zoospores, 1646.

Pigeon pea, 632.Pigs, 154, 752, 1594.Pink disease, 1657.Pirimiphos-methyl, 195.Planococcoides njalensis, 42, 43, 49, 123, 1072, 1073, 1994, 1998, 2092.Planococcus citri, 43, 44, 1998.Plant viruses, 975, 2034.Pleurotus ostreotus, 1037. Pod borer moth, 93.Polycephalomyces, 1066.Polyethylene glycol, 125.Polymerase chain reaction, 1238, 1998, 2101, 2102, 2103. Polyphenoloxidase, 2250.Polyphenolic compounds, 1240.Potash fertilizer see Potassium fertilizerPotassium, 70, 73, 316, 271, 317, 585, 852, 1396. Potassium fertilizer, 69, 318, 337.Potassium posphonate, 1655.Potatoes, 1691-1693.Potting media, 332.Propoxur, 164, 1974, 2339.Pseudococcidae, 979, 980, 2153.Pseudogibellula, 1061.Pseudotheraptus sp., 1433.Pseudotheraptus devastans, 1435.Pyrethroids, 1958.

QQuarantine, 1882, 2196.

RRadioactive phosphorus, 320, 904.Radioisotopes, 693, 2093. Randomly amplified polymorphic DNA see RAPD markersRAPD markers 219, 2097.Red thread disease, 94.Rice, 627.Rhizobium leguminosarum, 990.Ricinodendron heudelottii, 830.Robusta coffee (Coffea canephora), 428, 431, 544.

clones, 544, 1731.cuttings, 543.drought tolerance, 532.establishment, 1808.germination, 1803.intercropping, 1695.Ghana, 428, 431, 531, 544, 1808.growth, 430, 431, 1083.

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management, 428, 431.pectin, 136.quality, 1799, 1802weed competition, 1731.yield, 272, 429, 430, 431, 1802.

Rosette disease, 834, Rough bollworm, 1459.Roundup, 1734.Rubber, 2243.Rural appraisal, 2133.

SSahlbergella singularis

Cameroons, 810.control, 50, 2070.Gold Coast, 811, 2328, 2329, 2330.host, 1997.movement, 1969.population, 2330.parasitism, 1326, 1337.rearing, 2069.resistance of cocoa, 2027.Sex attractant, 1992.sex pheromone, 1992.1995. West Africa, 809, 810.

Scymnus (Pullus) sp., 42.Seed gardens, see Cocoa seed gardensSex attractants, 1992. Sex pheromones, 1458, 1459, 1993, 1995

See also: PheromonesShade crops, 1647. Shade trees, 411, 549, 550, 1653, 2188.Shea nut tree (Vitellaria paradoxa Gaernt), 137, 1697, 1782, 1783, 1785.

defoliator, 1004, 1013.fruit borer, 1005.germplasm, 210. insects, 1006.intercropping, 1689, 1809, 1810. propagation, 1688, 2333.

Sheep, 167, 1546, 1784, 2232, 2234, 2235.Shot hole borer, 1052.Sierra Leone, 722, 723, 772, 975, 2133. Silica, 74.Snakes, 1385.Soap, 155, 654.Sodium, 1399.Sodium chloride, 26.Soils, 272, 587, 928. 1085, 1554, 1086.

aluminium, 1561.arylsulphatase activity, 578, 580.boron, 270.chemistry, 340, 1112.clay minerals, 311.cocoa soils, 88, 311, 312, 316, 317, 321, 327, 336, 548, 570, 571, 574, 578, 793,

876, 877, 1194, 1195, 1196, 1197, 1551, 1554, 1559, 1561, 1566, 1567,

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1723, 1740.fauna, 1965.forest soils, see Tropical forest soils. fertility, 328, 340, 583, 584, 586, 851, 1558, 1563, 1564.Ghana, 65, 70, 270, 311, 312, 316, 317, 570, 571, 574, 578, 579, 586, 587, 851,

1194, 1195, 1196, 1553, 1559, 1561, 1567.Soils, (continued)

Gold Coast, 878, 880.inositol phosphate, 572, 577, 587, 1197.latosol, 578.management, 793.microbial biomass, 1560.moisture regimes, 2136.Nigeria, 875. nitrogen, 919, 1560. nutrients, 1558.organic matter, 1553. phosphatase activity, 571, 572, 577, 581, 587.phosphate, 1195, 1197. phospholipid P content, 1194.phosphorus, 65, 312, 570, 571, 587, 588, 1195, 1196, 1560, 1565, 1566. properties, 877, 1557. potassium, 70, 73, 316, 317, 585, 852, 1396, 1567.rehabilitation, 548, 574.silica, 74.sulfate, 579, 580.sulphate, see sulfatesurveys, 874, 878, 892, 2285, 2285, 2286.tropical forest soils, 68, 919, 920, 1565.

Somatic embryos, 225.South East Asia, 915.Soybean 1873.Spraying machines, 882, 1237, 1945.Stem borers, 194, 196, 197, 198, 1986, 1987.Stilbella, 1066.Sugar, 993, 1933.Suhum, 738.Sulfate, 579, 580.Sulfosate, 1743.sulphate, see sulfateSumithion, 2012.Swollen shoot disease, see Cocoa swollen shoot diseaseSystemic insecticide, see under Insecticides

TTapinanthus bangwensis see MistletoeTermites, 41, 48, 51, 52, 1294.Tetramorium aculeatum, 864, Thaimethoxam, 1988.Theobroma cacao, see Cocoa Theobroma grandiflora, 1500, 1502.Theobroma leiocarpa, 2023.

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Thin layer chromatography, 1455, 1460, 2336, 2337-2339.Thread blight, 679, 1380.TIBA, 1334.Togo, 810, 1883.Tomato black ring virus, 1299.Toxoptera aurantii, 1068, 1069, 1075-1077.Trachysphaera fructigena, 684, 2252.Triasulfuron, 1722, 1741, 1742.Triclopyr, 1723.Trinidad, 1, 2028, 2030.Tropical forest, 1059.Tyora tessmanni, 1286.

UUpper Amazon cocoa,

bean characteristics, 103.clones, 227, 1040, 1404.Ghana, 862, 1040, 1404.growth, 1409.insect pests, 97.hybrids, 99, 109, 1409.pollination, 1040.progenies, 103.shade, 862.yield, 99, 107, 108, 1409. See also Amazon cocoa

Urea, 1726, 1396.V

Valderrama, 627.Vectors, 817, 860, 906, 908, 909, 1051, 1057, 1355, 2038, 2045, 2152.

See also MealybugsVenezuela, 2044.Vicia faba, 991, 1722.Vinegar, 152.Virobacterial agglutination test, 1244, 1245. Viruses, 1355, 2034, 2040.

diseases, 975See also specific names of viruses

Vitellaria paradoxa see Sheanut W

WACRI, 2273, 2277, 2279, 2280, 2289-2294, 2300.breeding materials, 1138, 1513. clones, 1190.Nigeria, 2275.Research, 1482, 2019, 2185, 2274, 2278, 2298, 2301, 2302.varieties, 1130, 1136.1138, 1140, 1141, 1154.

See also CRIG varietiesWater stress, 911, 1085, 1122, 2188. Weeds, 1728, 1731, 1735.

control, 827, 828, 829, 1557, 1560, 1562, 1564, 1565, 1694, 1736, 1725, 1729,1738.chemical, 784, 791, 794, 795, 829, 1732, 1734, 1737, 1739, 1743.

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manual, 791, 794, 795, 829.

West Africa, 650, 808.-810, 897, 900, 914, 915, 1052, 1118, 1120, 1121, 1129, 1162, 1304, 1330, 1345, 1378, 1471, 1476, 1524, 1529, 1869, 2031, 2035, 2038, 2041, 2045, 2046, 2047, 2049, 2050, 2075, 2134, 2151, 2192, 2215, 2217, 2218, 2240, 2241, 2242, 2245, 2253, 2258, 2305, 2306.

West African Amelonado cocoa, see: Amelonado cocoaWest African Cocoa Research Institute, see: WACRIWitches’ broom disease, 501.Women, 636, 640, 641, 745.World Bank, 790, 1243, 1876.

XXanthodes graellsii, 1014.

ZZinc, 313, 1169, 1399.

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